期刊文献+
共找到797篇文章
< 1 2 40 >
每页显示 20 50 100
Synthesis and characterization of quaternized poly(phthalazinone ether sulfone ketone)for anion-exchange membrane 被引量:9
1
作者 Xi Gao Jian Chun Yan +3 位作者 Hua Min Zhang Shou Hai Zhang Cheng Liu Ping Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第10期1269-1272,共4页
Chloromethylated poly(phthalazinone ether sulfone ketone) (CMPPESK) was prepared from poly(phthalazinone ether sulfone ketone) (PPESK) using chloromethyl octyl ethers (CMOE) with lower toxicity as chlorometh... Chloromethylated poly(phthalazinone ether sulfone ketone) (CMPPESK) was prepared from poly(phthalazinone ether sulfone ketone) (PPESK) using chloromethyl octyl ethers (CMOE) with lower toxicity as chloromethylated regent. CMPPESK was soluble in N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc) and chloroform. Quaternized poly(phthalazinone ether sulfone ketone) (QAPPESK) was prepared from CMPPESK by quaternization. QAPPESK had excellent solvent resistance, which was only partly soluble in sulfuric acid (98%) and swollen in N,N-dimethylformamide (DMF). The vanadium redox flow battery (V-RFB) using QAPPESK anion-exchange membrane had better performance with 88.3% of overall energy efficiency. 展开更多
关键词 CHLOROMETHYLATION QUATERNIZATION polyphthalazinone ether sulfone ketone Anion-exchange membrane Vanadium redox flowbattery
下载PDF
Synthesis of Poly(phthalazinone ether ketone) Containing Sodium Sulfonate Groups via Direct Polymerization 被引量:3
2
作者 Shou Hai ZHANG Xi Gao JIAN +1 位作者 Guo Qing WANG Wen Xia LI 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第10期926-928,共3页
1, 2-Diliydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one(DHPZ) was sulfonated in concentrated Sulfuric acid. Poly(phthalazinone ether ketone) containing pendant sodium sulfonate group was synthesized from sulfonated and ... 1, 2-Diliydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one(DHPZ) was sulfonated in concentrated Sulfuric acid. Poly(phthalazinone ether ketone) containing pendant sodium sulfonate group was synthesized from sulfonated and pure 1,2-dihydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one, and 4,4'-difluorodiphenylketone. The sulfonated monomer and sulfonated polymer were characterized with FT-IR and H-1-NMR. 展开更多
关键词 SULFONATION SYNTHESIS poly(phthalazinone ether ketone).
下载PDF
Synthesis and characterization of novel poly(aryl ether sulfone ketone)s containing phthalazinone and biphenyl moieties 被引量:3
3
作者 Li Hong Xiao Cheng Liu Xi Gao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第2期227-229,共3页
A novel series of poly(aryl ether sulfone ketone)s (PPESKs) containing phthalazinone and biphenyl moieties were prepared by two-step nucleophilic polycondensation reaction. The ^-Mw values of these copolymers were... A novel series of poly(aryl ether sulfone ketone)s (PPESKs) containing phthalazinone and biphenyl moieties were prepared by two-step nucleophilic polycondensation reaction. The ^-Mw values of these copolymers were between 38,330 and 67,900. The glass transition temperatures (Tg) and 5% decomposition temperatures were ranged in 253-269 ℃ and 488-500 ℃, respectively, The structures of these copolymers were confirmed by FT-IR and ^1H NMR. Moreover, all the resultant copolymers were amorphous determined by wide angle X-ray diffraction (WAXD). 展开更多
关键词 poly(aryl ether sulfone ketone phthalazinone BIPHENYL Thermal property Solubility
下载PDF
Characterization and tribological investigation of self-assembled trimethoxysilyl-functionalized poly(phthalazinone ether ketone)thin films on glass substrates 被引量:2
4
作者 Qi Feng Jin Gong Xiong Liao +1 位作者 Shi Jun Yu Xi Gao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第8期973-975,共3页
Trimethoxysilyl-functionalized PPEK(PKGS) films had been designed to serve as wear resistant coatings for silicon surfaces. These surface films were formed by a dip-coating technique applied to self-assembled monola... Trimethoxysilyl-functionalized PPEK(PKGS) films had been designed to serve as wear resistant coatings for silicon surfaces. These surface films were formed by a dip-coating technique applied to self-assembled monolayers(SAMs).The formation and wetting behavior of PKGS films were characterized by means of contact angle measurement.The friction coefficient of the film prepared is very low(about 0.1),and the anti-wear behavior is good,with a lack of failure after sliding over 1800 s. 展开更多
关键词 phthalazinone poly(aryl ether ketone Self-assemble film Friction and wear
下载PDF
SYNTHESIS AND CHARACTERIZATION OF POLY(ARYL ETHER KETONE)CONTAINING BIPHENYLPHTHALAZINONE MOIETY 被引量:2
5
作者 蹇锡高 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1999年第5期495-497,共3页
A new poly(aryl ether ketone) containing biphenylphthalazinone moiety was prepared by the reaction of 4-(4-hydroxybiphenyl) phthalazine-1-one with 4, 4'-difluorobenzophenone. The monomer and the polymer were chara... A new poly(aryl ether ketone) containing biphenylphthalazinone moiety was prepared by the reaction of 4-(4-hydroxybiphenyl) phthalazine-1-one with 4, 4'-difluorobenzophenone. The monomer and the polymer were characterized by FT-IR and H-1-NMR. Some properties of this polymer were described. 展开更多
关键词 poly(aryl ether ketone) biphenylphthalazinone
下载PDF
SYNTHESIS AND CHARACTERIZATION OF POLY(ARYL ETHER KETONE)FROM 4-(3-PHENYL-4-HYDROXYPHENYL)PHTHALAZINONE 被引量:1
6
作者 蹇锡高 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1999年第5期491-493,共3页
A novel soluble poly(aryl ether ketone) was prepared by the reaction of 4-(3-phenyl-4-hydroxyphenyl)phthalazinone with 4,4'-difluorobenzophenone. The polymer was characterized by DSC, TGA and X-ray diffraction.
关键词 poly(aryl ether ketone) SYNTHESIS heterocyclic polymer
下载PDF
Sulfonation of Poly(phthalazinone ether sulfone ketone) and Its Application to Isobutene Oligomerization 被引量:1
7
作者 ANZengjian ZHOUPeng 《催化学报》 SCIE CAS CSCD 北大核心 2003年第1期1-2,共2页
关键词 聚醚砜酮 磺化 异丁烯 低聚反应 催化剂 聚异丁烯
下载PDF
Synthesis and characterization of trimethoxysilyl-functionalized poly(phthalazinone ether ketone)
8
作者 Qi Feng Jin Gong Xiong Liao Xi Gao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第9期1137-1140,共4页
A novel alkoxysilyl-functionalized poly(phthalazinone ether ketone) (PPEK) was prepared for the boundary lubricant application in micro-electro-mechanical system (MEMS). The synthesis of functionalized PPEK was starte... A novel alkoxysilyl-functionalized poly(phthalazinone ether ketone) (PPEK) was prepared for the boundary lubricant application in micro-electro-mechanical system (MEMS). The synthesis of functionalized PPEK was started from the hydroxylation of PPEK, then following with the corresponding ring-opening reaction of 3-glycidoxypropyltrimethoxysilane (GPTMS). The structures of the functional PPEK were confirmed by FTIR, 1H NMR, 29Si NMR, and UV–vis spectrum. 展开更多
关键词 phthalazinone poly(aryl ether ketone) Glycidoxypropyltrimethoxysilane SYNTHESIS
下载PDF
Synthesis and Characterization of Poly (Aryl Ether Ketone) Containing Phthalazinone and Naphthalene Moieties
9
作者 Ye GAO Xi Gao JIAN Jin Yan WANG Department of polymer Science, College of Chemical Engineering, Dalian University of Technology, Dalian 116012 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第9期777-778,共2页
A novel poly (aryl ether ketone) (PPEK) containing phthalazinone and naphthalene moieties was prepared by the nucleophilic displacement reaction of 4-(4-hydroxyphenyl) (2H) phthalazin-1-one with 1-chloro-4-(4-chlorobe... A novel poly (aryl ether ketone) (PPEK) containing phthalazinone and naphthalene moieties was prepared by the nucleophilic displacement reaction of 4-(4-hydroxyphenyl) (2H) phthalazin-1-one with 1-chloro-4-(4-chlorobenzoyl) naphthalene. The polymer was characterized by FTIR, H-1-NMR, DSC, TGA and WAXD. 展开更多
关键词 engineering thermoplastics poly (aryl ether ketone) synthesis
下载PDF
SYNTHESIS AND CHARACTERIZATION OF PHTHALAZINONE POLY(ARYL ETHER SULFONE KETONE)WITH CARBONYL GROUP
10
作者 Ying-nan Xuan Yan Gao +1 位作者 Yong Huang Xi-gao Jian Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences, Guangzhou 510650 China Institute of Chemistry Chinese Academy of Sciences, Beijing 100080 China Department of Polymer Science, College of Chemical Engineering Dalian University of Technology, Dalian 116012, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2002年第3期225-229,共5页
A kind of novel heat-resistant, high performance engineering thermoplastic phthalazinone poly(aryl ether sulfone ketone) (PPESK) containing a carboxyl group in its side chain was prepared by the nucleophilic displacem... A kind of novel heat-resistant, high performance engineering thermoplastic phthalazinone poly(aryl ether sulfone ketone) (PPESK) containing a carboxyl group in its side chain was prepared by the nucleophilic displacement reaction of 4-(4-hydroxylphenyl)- 1 (2H)-phthalazinone with di(4-chlorophenyl) sulfone, 4,4'-difluoro-benzophenone and phenolphthalin in sulfolane in the presence of K2CO3 to produce high molecular weight polymers which can be dissolved in some polar solvents such as chloroform and nitrobenzene at room temperature and can be easily cast into flexible, yellowish and transparent films. PPESK is an amorphous polymer having a decomposition temperature above 400degreesC, which indicates that it has high thermal stability. At the same time, the thermal properties of PPESKs with dicyandiamide (DICY) as curing agent indicated that the heat-resistance properties of the PPESKs are improved after curing. The apparent activation energy (A-E) of the cross-linking reaction and the reaction order (n) of PPESK/DICY were found to be 52.2 kJ/mol and ca. 1.0, respectively. Therefore, the cross-linking reaction is approximately a first order reaction. 展开更多
关键词 poly(aryl ether sulfone ketone) synthesis active pendant group
下载PDF
Synthesis and Characterization of Poly (Ether Sulfone Ketone) Containing the Phthalazinone Moiety 被引量:1
11
作者 Yan Jun LIU Sheng Jun LIU Xi Gao JIAN(Department of polymer Science, College of Chemical Engineering, DalianUniversity of Technology, Dalian 116012) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第3期257-258,共2页
A novel poly (ether sulfone ketone) containing the phthalazinone moiety was prepared by the reaction of 4-)4-hydroxyphenyl) (2H) phthalazin-1-one with activated dichloro-monomers. The polymer was characterized by FT-I... A novel poly (ether sulfone ketone) containing the phthalazinone moiety was prepared by the reaction of 4-)4-hydroxyphenyl) (2H) phthalazin-1-one with activated dichloro-monomers. The polymer was characterized by FT-IR, H-1-NMR, DSC, TGA and X-ray diffraction. 展开更多
关键词 engineering plastics poly (aryl ether sulfone ketone) heterocyclic polymer
全文增补中
Synthesis and characterization of new soluble poly(aryl ether nitrile)s containing phthalazinone moiety 被引量:10
12
作者 Ming Jing Wang Cheng Liu Li Ming Dong Xi Gao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第5期595-597,共3页
A series of novel poly(aryl ether nitrile)s containing phthalazinone moiety were synthesized by the nucleophilic displacement reaction of bisphenol-like monomers (I) with 2,6-difluorobenzonitrile. The inherent vis... A series of novel poly(aryl ether nitrile)s containing phthalazinone moiety were synthesized by the nucleophilic displacement reaction of bisphenol-like monomers (I) with 2,6-difluorobenzonitrile. The inherent viscosities ranged from 0.46 to 1.07 dL g^-1. The glass transition temperatures were in the range of 277-295℃, and the temperatures for 10% weight loss in nitrogen atmosphere were found between 495 and 527 ℃. The structures of these resultant polymers were confirmed by FT-IR and 1^H NMR. Moreover, the properties of poly(aryl ether nitrile)s including solubility and crystallinity were also studied. 展开更多
关键词 poly(aryl ether nitrile)s phthalazinone HEAT-RESISTANCE Solubility
下载PDF
UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone) 被引量:6
13
作者 CHEN Rui-chao, SUN Hui, LI Ang and XU Guo-zhi College of Materials Science and Mechanical Engineering, National Center for Quality Supervision and Test of Plastic Products, Beijing Technology and Business University, Beijing 100048, P. R. China 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第1期162-165,共4页
Photo-grafting of hydrophilic monomer was used to enhance the hydrophilicity of poly(ether ether ketone) (PEEK) with the aim of extending its applications to biological fields. PEEK sheets were surface modified by... Photo-grafting of hydrophilic monomer was used to enhance the hydrophilicity of poly(ether ether ketone) (PEEK) with the aim of extending its applications to biological fields. PEEK sheets were surface modified by grafting of acrylamide(AAm) with ultraviolet(UV) irradiation in the presence or absence of benzophenone(BP). The effects of BP, irradiation time and monomer concentration on the surface wettability of PEEK were investigated. Characteriza tion of modified PEEK using scanning electron microscopy(SEM), energy-disperse spectrometer(EDS) and water contact angle measurements shows that AAm was successfully grafted on PEEK surface both in presence and absence of BP. With the increase in irradiation time and monomer concentration, contact angles decrease to as low as 30°, demonstrating a significant improvement of surface hydrophilicity. In agreement with the decrease in contact angle, under identical conditions, the nitrogen concentration increases, suggesting the increase in grafting degree of the grafting polymerization. This investigation demonstrates a self-initiation of PEEK due to its BP-like structure in the backbone of the polymer. Though the graft polymerization proceeds more readily in the presence of BP, the self-initiated graft polymerization is clearly observed. 展开更多
关键词 polyether ether ketone)(PEEK) UV-grafting Surface modification Self-initiation Graft polymerization
下载PDF
Synthesis of Novel Poly(aryl ether amide)s Containing the Phthalazinone Moiety 被引量:4
14
作者 Lin CHENG~1 Xi Gao JIAN~2 (~1Department of Materials Science & Engineering, Wuhan Institute of Chemical Technology. Wuhan 430074) (Department of Polymer Science & Materials. DaLian University of Technology. DaLian 1 16012) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第4期307-310,共4页
Two novel heterocyclic diamine monomers: 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl] (2H)phthalazin-1-one and 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)-3,5-dimethylphenyl](2H)phthalazin-1-one ... Two novel heterocyclic diamine monomers: 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl] (2H)phthalazin-1-one and 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)-3,5-dimethylphenyl](2H)phthalazin-1-one were successfully synthesized from readily available heterocyclic bisphenol-like monomers in two steps in high yield. A series of novel poly(aryl ether amide)s containing the phthalazinone moiety were successfully prepared by the direct polymerization of the novel diamines and aromatic dicarboxylic acids using triphenyl phosphite and pyridine as condensing agents. 展开更多
关键词 poly(aryl ether amide)s phthalazinone direct polymerization heterocyclic diamine
下载PDF
Proton-Exchange Sulfonated Poly (ether ether ketone) (SPEEK)/SiOx-S Composite Membranes in Direct Methanol Fuel Cells 被引量:6
15
作者 高启君 王宇新 +2 位作者 许莉 卫国强 王志涛 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第2期207-213,共7页
A sulfonated poly(ether ether ketone) (SPEEK) membrane with a fairly high degree of sulfonation (DS) can swell excessively and even dissolve at high temperature. To solve these problems, insolvable functionalize... A sulfonated poly(ether ether ketone) (SPEEK) membrane with a fairly high degree of sulfonation (DS) can swell excessively and even dissolve at high temperature. To solve these problems, insolvable functionalized silica powder with sulfonic acid groups (SiOx-S) was added into the SPEEK matrix (DS = 55.1%) to prepare SPEEK/ SiOx-S composite membranes. The decrease in both the swelling degree and the methanol permeability of the membranes was a dose-dependent result of addition of the SiOx-S powder. Pure SPEEK membrane swelled 52.6% at 80℃, whereas the SPEEK/SiOx-S (15%, by mass) membrane swelled only 27.3% at the same temperature. From room temperature to 80℃, all SPEEK/SPEEK/SiOx-S composite membranes had methanol permeability of about one order of magnitude lower than that ofNafion115. Compared with pure SPEEK membranes, the addition of the SiOx-S powder not only leads to higher proton conductivity, but also increases the dimensional stability at higher temperatures, and greater proton conductivity can be achieved at higher temperature. The SPEEK/SiO4-S (20%, by mass) membrane could withstand temperature up to 145℃, at which in 100% relative humidity (RH) its proton conductivity exceeded slightly that of Nafion 1 15 membrane and reached 0.17 S·cm^-1, while pure SPEEK membrane dissolved at 90℃. The SPEEK/SiOx-S composite membranes are promising for use in direct methanol fuel cells because of their good dimensional stability, high proton conductivity, and low methanol permeability. 展开更多
关键词 sulfonated polyether ether ketone functionalized silica composite membrane direct methanol fuel cell
下载PDF
Immobilization of Bovine Serum Albumin on Poly(ether ether ketone) for Surface Biocompatibility Improvement 被引量:4
16
作者 SUN Hui CHEN Rui-chao +1 位作者 LI Ang XU Guo-zhi 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第2期353-357,共5页
UV-induced graft polymerization of acrylic acid(AA) on poly(ether ether ketone)(PEEK) films was carried out to introduce ―COOH for the subsequent immobilization of bovine serum albumin(BSA).BSA was introduced... UV-induced graft polymerization of acrylic acid(AA) on poly(ether ether ketone)(PEEK) films was carried out to introduce ―COOH for the subsequent immobilization of bovine serum albumin(BSA).BSA was introduced on PEEK surface based on the condensation reaction between ―NH 2 and ―COOH.The modified surface(PEEK-BSA) was characterized by energy-disperse spectrometry(EDS),X-ray photoelectron spectroscopy(XPS),water contact angle measurement and UV spectrum analysis.The contact angle was found to decrease from 104° for the virgin PEEK films to 63° for the BSA-immobilized PEEK films,demonstrating a significant improvement of surface hydrophilicity.Moreover,the appearance of nitrogen on PEEK film confirmed by XPS and EDS indicates the immobilization of BSA on PEEK surface. 展开更多
关键词 polyether ether ketone)(PEEK) UV-grafting Bovine serum albumin immobilization
下载PDF
Synthesis and Thermal Crosslinking Behavior of Poly(aryl ether ketone)s Containing 1,4-Naphthalene Moieties 被引量:3
17
作者 NIUYa-ming ZHANGYun-he CHENXing-bo WANGGui-bin JIANGZhen-hua 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2005年第1期109-113,共5页
A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,... A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,4-naphthalenedicarboxylic acid with thionyl chloride. The Friedel-Crafts acylation of compound 1 with fluorobenzene afforded compound 2 in a 80% yield. The polycondensation of compound 2 with various bisphenols in tetramethylene sulfone(TMS) in the presence of excess potassium carbonate as a condensation reagent was carried out at 210 ℃ to quantitatively afford the corresponding poly(aryl ether ketone)s(compounds 3_8) containing 1,4-naphthalene moieties. Thermal analyses showed that the polymers have T g values ranging from 496 to 500 K and are thermally stable in air with initial mass loss above 500 ℃. These novel polymers exhibited an excellent solubility in organic solvents including NMP, DMAc, and chloroform, etc. In addition, the glass transition temperatures of these polymers increased and the polymers became insoluble in chloroform after treated at 260 ℃, indicating the occurrence of a thermal crosslinking reaction. 展开更多
关键词 poly(aryl ether ketone) Naphthalene derivatives Friedel-Crafts acylation Thermal crosslinking properties
下载PDF
Synthesis and Characterization of Poly(ether imide)s Containing m-Methyl and Phthalazinone Moieties 被引量:2
18
作者 Jin Yan WANG Shu De XIAO Xi Gao JIAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第4期331-332,共2页
Three novel poly(ether imide)s were synthesized by one-step solution polymerization from 2-(3, 4-dicarboxyl-N-phenyl)-4-(3, 4-dicarboxyl-phenoxyl-4-(2-methyl)-phenyl)-2, 3- phthal-azin-1-one dianhydride and three amin... Three novel poly(ether imide)s were synthesized by one-step solution polymerization from 2-(3, 4-dicarboxyl-N-phenyl)-4-(3, 4-dicarboxyl-phenoxyl-4-(2-methyl)-phenyl)-2, 3- phthal-azin-1-one dianhydride and three amines, and characterized. The polymers show good solubility and thermal properties. 展开更多
关键词 Synthesis poly(ether imide)s phthalazinone dianhydride.
下载PDF
Proton-exchange Sulfonated Poly(ether ether ketone)/Sulfonated Phenolphthalein Poly(ether sulfone) Blend Membranes in DMFCs 被引量:3
19
作者 高启君 王宇新 +2 位作者 许莉 王志涛 卫国强 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第6期934-941,共8页
A sulfonated poly(ether ether ketone) (SPEEK) membrane with fairly high degree of sulfonation (DS) swells excessively and even dissolves at high temperature. To solve these problems, sulfonated phenolphthalein p... A sulfonated poly(ether ether ketone) (SPEEK) membrane with fairly high degree of sulfonation (DS) swells excessively and even dissolves at high temperature. To solve these problems, sulfonated phenolphthalein poly(ether sulfone) (SPES-C, DS= 53.7%) is blended with the SPEEK matrix (DS= 55.1%, 61.7%) to prepare SPEEKJSPES-C blend membrane. The decrease in swelling degree and methanol permeability of the membrane is dose-dependent. Pure SPEEK (DS = 61.7%) membrane dissolves completely in water at 70℃, whereas the swelling degree of the SPEEK (DS = 61.7%)/SPES-C (40%, by mass) membrane is 29.7% at 80℃. From room temperature to 80℃, the methanol permeability of all SPEEK (DS = 55.1%)/SPES-C blend membranes is about one order of magnitude lower than that of Nafion 115. At higher temperature, the addition of SPES-C polymer increases the dimensional stability and greater proton conductivity can be achieved. The SPEEK (DS = 55.1%)/SPES-C (40%, by mass) membrane can withstand temperatures up to 150℃. The proton conductivity of SPEEK (DS = 55.1%)/SPES-C (30%, by mass) membrane approaches 0.16 S·cm^-1, matching that of Nafion 115 at 140℃ and 100% RH, while pure SPEEK (DS = 55.1%) membrane dissolves at 90℃. The SPEEK/SPES-C blend membranes are promising for use in direct methanol fuel cells because of their good dimensional stability, high proton conductivity, and low methanol permeability. 展开更多
关键词 sulfonated polyether ether ketone sulfonated phenolphthalein polyether sulfone) blend membrane direct methanol fuel cell
下载PDF
Synthesis and characterization of poly(phthalazinone ether nitrile) (PPEN)-polydimethylsiloxane (PDMS) block copolymers 被引量:1
20
作者 Li Ming Dong Gong Xiong Liao +1 位作者 Ming Jing Wang Xi Gao Jian 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第2期230-232,共3页
Block copolymers with different backbone compositions have been prepared by the condensation of dimethylamino terminated poly(dimethylsiloxane) (PDMS) and hydroquinone terminated poly(phthalazinone ether nitrile... Block copolymers with different backbone compositions have been prepared by the condensation of dimethylamino terminated poly(dimethylsiloxane) (PDMS) and hydroquinone terminated poly(phthalazinone ether nitrile) (PPEN) in the presence of chlorobenzcne/N-methyl pyrrolidone (NMP) as solvents. The products were characterized by FTIR, ^1H NMR and gel permeation chromatography. Differential scanning calorimetry analysis indicated that the block copolymers showed separated microphase. 展开更多
关键词 Block copolymers polyphthalazinone ether nitrile) polyDIMETHYLSILOXANE Synthesis
下载PDF
上一页 1 2 40 下一页 到第
使用帮助 返回顶部