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
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...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.展开更多
We synthesized a series of polymers: poly(ether ether ketone ketone) (PEEKK),poly (ether biphenyl ether ketone ketone) (PEBEKK) and their copolymer by polycondensation. We also prepared a series of PEEKK-PEBEKK blends...We synthesized a series of polymers: poly(ether ether ketone ketone) (PEEKK),poly (ether biphenyl ether ketone ketone) (PEBEKK) and their copolymer by polycondensation. We also prepared a series of PEEKK-PEBEKK blends. By using DSC method, we found that Tg of the copolymers and the blends rose with the increasing of biphenyl contents in the polymers. Tc of the copolymers and the blends is higher than the corresponding homopolymer. From the results, we think that PEEKK-PEBEKK copolymer and blends are miscible and the copolymer is random.展开更多
运用气相色谱-离子阱质谱（ion trap mass spectrometry，ITMS）建立了大气中8种多溴二苯醚的二级质谱（MS／MS）检测方法。优化后的MS／MS方法对7种三溴至七溴二苯醚（BDE28、-47、-99、-100、-153、-154、-183）和十溴二苯醚（BDE209...运用气相色谱-离子阱质谱（ion trap mass spectrometry，ITMS）建立了大气中8种多溴二苯醚的二级质谱（MS／MS）检测方法。优化后的MS／MS方法对7种三溴至七溴二苯醚（BDE28、-47、-99、-100、-153、-154、-183）和十溴二苯醚（BDE209）的仪器检出限分别为0．04～0．23pg和9．38pg；方法检出限为6．0～27．1pg／m^3和211．6pg／m^3；6点标准曲线相关系数（r）为0．9980～0．9999。方法对8种目标物的加标回收率为79．1％～101．0％，相对标准偏差（RSD）为4．3％～14．3％（n=6）。对6份南京实际大气样品的检测结果表明：离子阱质谱的选择反应监测（selected reaction monitoring，SRM）技术能有效的降低背景干扰。优化后的MS／MS方法对目标化合物有较高的灵敏度，可应用于大气中痕量多溴二苯醚的定量检测。展开更多
文摘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）.
基金This work is sponsored by the National Natural Science Foundation of China (No. 59473901).
文摘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.
文摘We synthesized a series of polymers: poly(ether ether ketone ketone) (PEEKK),poly (ether biphenyl ether ketone ketone) (PEBEKK) and their copolymer by polycondensation. We also prepared a series of PEEKK-PEBEKK blends. By using DSC method, we found that Tg of the copolymers and the blends rose with the increasing of biphenyl contents in the polymers. Tc of the copolymers and the blends is higher than the corresponding homopolymer. From the results, we think that PEEKK-PEBEKK copolymer and blends are miscible and the copolymer is random.
