Synthesis and characterization of new soluble poly(aryl ether nitrile)s containing phthalazinone moiety

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.

Synthesis and characterization of quaternized poly(phthalazinone ether sulfone ketone)for anion-exchange membrane

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.

Synthesis of Novel Poly(aryl ether amide)s Containing the Phthalazinone Moiety

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.

Synthesis and characterization of novel poly(aryl ether sulfone ketone)s containing phthalazinone and biphenyl moieties

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）.

Synthesis of Poly(phthalazinone ether ketone) Containing Sodium Sulfonate Groups via Direct Polymerization

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.

Synthesis and Characterization of Poly(ether imide)s Containing m-Methyl and Phthalazinone Moieties

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.

Characterization and tribological investigation of self-assembled trimethoxysilyl-functionalized poly(phthalazinone ether ketone)thin films on glass substrates

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.

Synthesis and characterization of poly(phthalazinone ether nitrile) (PPEN)-polydimethylsiloxane (PDMS) block copolymers

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.

Synthesis and Characterization of Poly (ether imide)s Containing Phthalazinone and Isopropyl Moieties

A novel poly(ether imide)s containing phthalazinone and isopropyl moieties derived from 2-(4-aminophenyl)-4-[4-(4-aminophenoxy)phenyl]-phthalazin-1-one and bisphenol-A diphthalic anhydride was synthesized by one-step solution condensation polymerization in nr-cresol. The polymer was characterized by FTIR, NMR, molecular weights, glass transition temperature, thermal degradation temperature and WAXD.

Synthesis and characterization of trimethoxysilyl-functionalized poly(phthalazinone ether ketone)

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.

SYNTHESIS AND CHARACTERIZATION OF POLY(PHTHALAZINONE ETHER PHOSPHINE OXIDE)S BY N-C COUPLING REACTION

Based on several unsymmetrical, twist, noncoplanar phthalazinone-containing monomers 2a-2e and an active bis（4-fluorophenyl）phenyl phosphine oxide （BFPPO） monomer, a series of novel poly（phthalazinone ether phosphine oxide）s （PPEPO） was synthesized by anhydrous K2CO3 mediated N-C coupling reaction in DMAc. The polymers exhibited good thermal properties with Tgs ranging from 267℃ to 306℃ and 5% weight loss temperatures in nitrogen higher than 430℃, together with high char yield upon prolonged heating at 800℃ （35%-56%）. Moreover, the polymers were readily soluble in common organic solvents, such as N-methyl-2-pyrrolidone, chloroform and m-cresol. These polymers had inherent viscosities in the range of 0.45-0.72 dL/g and could be cast into flexible and colorless films by spin coating or casting approach.

Synthesis, Characterization and Properties of Poly(aryl amides) Containing Methoxy Substituted Phthalazinone Moiety

A novel aromatic diamine, 1, 2-dihydro-2-（4-aminophenyl）-4-[3-methoxy-4-（4-aminophenoxy）]-2, 3-phthalazin-l-one （OO-DA） containing aza heterocyclic structure was synthesized from the bisphenol-like monomer in two steps and used for preparing new aromatic polyamides with high inherent viscosity of 0.89-1.03 dL.g^-1. The structures of diamine and polymers obtained were confirmed by MS, PT-IR, WAXD and ^1H-NMR. The synthesized polymers exhibited high glass transition temperature in the range of 281-307℃ and good solubility in polar solvents.

Synthesis and Characterization of a Novel Copoly(aryl ether ketone) Containing 4, 4'-Biphenyl-bis[4-phthalazin-1(2H)-one] Moiety

A new monomer of 4, 4-biphenyl-bis[4-phthalazin-1(2H)-one] was synthesized from biphenyl and phthalic anhydride, and a novel copoly(aryl ether ketone) (PPEK) was synthesized from 2, 2-bis(4-hydroxyphenyl)-propane (BPA), 4, 4'-biphenyl-bis-[4-phthalazin-1(2H)-one], 4, 4- difluorodiphenylketone (DFK). The monomer and copolymer were characterized by FT-IR and 1H-NMR. DSC and TGA were used to the novel polymer.

Poly(ether ether ketone ketone) based imidazolium as anion exchange membranes for alkaline fuel cells

An imidazolium functionalized poly(ether ether ketone ketone)(PEEKK-DIm OH)anion exchange membrane(AEM)readily soluble in certain low-boiling-point solvents(isopropanol)is prepared.The solubility results are consistent with the results of molecular dynamics simulations.By varying the chloromethylation reaction temperature or concentrated sulfuric acid concentration of PEEKK,the degrees of chloromethylation of PEEKK are changed from 54% to 92%,the corresponding PEEKK-DIm OH AEMs with the ion exchange capacities(IECs)of 1.14–1.65 mmol·g^(-1).The PEEKK-DIm OH 92% AEM shows high hydroxide conductivity(31 m S·cm^(-1)),suitable water uptake(94%)and acceptable swelling ratio(39%)at 60°C.In addition,the PEEKK-DIm OH AEMs possess good thermal and alkaline stability.The maximum power density(46.16 mW·cm^(-2))of fuel cell prepared with PEEKK-DIm OH 92%AEM as exchange membrane and ionomer is much higher than that with commercial AHA membranes.All the above results indicate that the PEEKK used in this study is a promising AEM matrix material for alkaline fuel cells.

含苯磺酸侧基杂萘联苯聚醚砜纳滤膜的制备与性能

将含苯磺酸侧基杂萘联苯聚醚砜(SPPES-P-H)浸泡于氯化钠溶液中得到含苯磺酸钠侧基杂萘联苯聚醚砜(SPPES-P-Na),采用涂覆法制备含苯磺酸侧基杂萘联苯聚醚砜复合纳滤膜,考察聚合物浓度、热处理条件对复合纳滤膜性能的影响.结果表明,SPPES-P-Na复合纳滤膜的通量高于SPPES-P-H复合纳滤膜的通量;当SPPES-P-Na的质量分数为1.5%,热处理温度为100℃,热处理时间为30 min时,复合膜的水通量达到58.0 L/(m^(2)·h),Na_(2)SO_(4)的脱盐率为89.0%;当操作温度为95℃时,复合膜的水通量为205.0 L/(m^(2)·h),对Na_(2)SO_(4)的脱盐率为82.0%,表现出良好的耐热性;将复合膜在质量浓度0.2 g/L的次氯酸钠溶液中浸泡10 d,性能无明显变化,表现出优异的耐氯性.

含醚键双二氮杂萘酮结构聚芳醚腈砜的合成与性能

文中以含醚键双二氮杂萘酮结构化合物4,4’-双(氧基(1,4-苯撑))-双二氮杂萘-1(2H)酮-二苯醚(OBDHPZ)为类双酚单体,与4,4’-二氟二苯砜(DFS)和2,6’-二氟苯腈(DFBN)进行高温溶液缩聚反应,通过调节聚合物分子主链中砜基和氰基等的含量,合成了一系列不同腈砜比的含醚键双二氮杂萘酮联苯结构聚芳醚腈砜树脂(PBPENS),其N-甲基吡咯烷酮(NMP)溶液在25℃的特性黏度为0.63~0.90 dL/g。通过红外光谱、核磁共振氢谱和广角X射线衍射仪表征了所合成聚芳醚腈砜的结构;通过差示扫描量热仪和热失重分析仪分析了该类聚芳醚腈砜的热性能,聚合物的玻璃化转变温度(Tg)在322~325℃,5%热失重温度(Td5%)在485~500℃。该类聚合物在常温时可溶解于NMP、N,N-二甲基乙酰胺(DMAc)、氯仿等极性非质子有机溶剂;采用溶液浇筑法制备了含醚键双二氮杂萘酮结构聚芳醚腈砜薄膜,薄膜的拉伸强度可以达到56~65 MPa。

成型温度对CF/PPEK复合材料的缺陷和力学性能影响

分别采用溶液浸渍法及真空热压成型法制备了连续碳纤维增强含杂萘联苯结构聚芳醚酮(CF/PPEK)预浸料和复合材料,对不同成型温度制备的复合材料进行了超声相控阵和三维X射线显微镜(XRM)无损检测,利用旋转流变仪、电子万能试验机、动态力学分析仪(DMA)、红外光谱仪(FT-IR)、扫描电镜(SEM)、金相显微镜对CF/PPEK复合材料进行了表征,系统研究了成型温度对纤维的浸润质量以及复合材料孔隙率、弯曲行为和层间剪切性能的影响,通过力学性能分析和断口形貌表征研究了断裂机理及缺陷对其性能产生的影响。试验结果表明:成型温度为350℃时,CF/PPEK复合材料的弯曲模量和层间剪切强度分别为125 GPa和64 MPa;成型温度为360℃时,CF/PPEK复合材料的缺陷最少,弯曲强度可达1376 MPa;而370℃高温下,复合材料出现明显缺陷,各方面性能急剧下降。

AlCl_3-正丁醚络合催化剂催化1-癸烯齐聚反应的研究

聚α-烯烃是高品质的润滑油基础油。使用AlCl3-正丁醚络合催化剂催化1-癸烯齐聚,合成低粘度的PAO,考察了催化剂的质量分数、AlCl3与正丁醚的摩尔比、反应温度、反应时间等工艺条件对PAO收率的影响。结果表明,1-癸烯齐聚合成PAO的最佳工艺条件是:AlCl3的摩尔分数为5%,反应温度为30℃,反应时间为4 h。在最佳工艺条件下,可以合成100℃粘度为8.99 mm2/s,粘度指数为170的聚烯烃合成油PAO,收率为87%。具有粘度低、粘度指数高的显著特点,是高质量的聚α-烯烃合成油。

杂萘联苯聚芳醚酮表面水凝胶涂层的制备及其抗菌性能

在杂萘联苯聚芳醚酮(PPEK)与银粉掺杂制备的复合材料表面造孔后,采用银离子催化表面自由基聚合法制备聚丙烯酸/丙烯酰胺水凝胶涂层。通过傅里叶变换红外光谱仪、钨灯丝扫描电子显微镜、X射线光电子能谱仪等对水凝胶涂层的结构与性能进行表征,并研究水凝胶涂层改性PPEK的抑菌作用及其细胞相容性。结果表明:PPEK表面造孔后,涂层与基体材料的结合能从185.83 J/m^(2)提高到926.26 J/m^(2);该水凝胶涂层对大肠杆菌和金黄色葡萄球菌的抑菌率达到95%以上,且无细胞毒性,扩大了PPEK在医疗卫生领域的应用。