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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of poly(ether nitrile sulfone) copolymers with pendant methyl groups
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Synthesis and properties of poly(ether nitrile sulfone) copolymers with pendant methyl groups

机译：甲基侧基聚醚腈砜共聚物的合成与性能

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摘要

Poly(ether nitrile) and poly(ether nitrile sulfone) copolymers with pendant methyl groups were prepared by the nucleophilic substitution reaction of 2,6'-dichlorobenzonitrile with methyl hydroquinone and with varying mole proportions of methyl hydroquinone and 4,4'-dihydroxydiphenylsulfone using N-methyl pyrrolidone as a solvent in the presence of anhydrous K2CO3. The polymers were characterized by different physicochemical techniques. Copolymer composition was determined using the FTIR technique. Thermogravimetric data revealed that all polymers were stable up to 420 degrees C with a char yield above 40% at 900 degrees C in a nitrogen atmosphere. The glass-transition temperature increased and the activation energy and inherent viscosities decreased with an increase in the concentration of the 4,4'-dihydroxydiphenylsulfone units in the polymer. Trimerization reactions were favorable with an increase in the concentration of methyl hydroquinone units in the polymer. The crystallinity of the polymer was also studied using wide-angle X-ray diffraction. (C) 2005 Wiley Periodicals, Inc.
机译：通过2,6'-二氯苄腈与甲基对苯二酚的亲核取代反应，以及使用不同摩尔比例的甲基对苯二酚和4,4'-二羟基二苯砜的亲核取代反应，制备了具有侧链甲基的聚（醚腈）和聚（醚腈砜）共聚物。在无水K2CO3存在下，N-甲基吡咯烷酮作为溶剂。通过不同的物理化学技术表征聚合物。使用FTIR技术确定共聚物组成。热重数据表明，所有聚合物在氮气气氛中，在900摄氏度下，最高可稳定在420摄氏度下，焦炭收率超过40％。随着聚合物中4,4'-二羟基二苯砜单元浓度的增加，玻璃化转变温度升高，活化能和固有粘度降低。随着聚合物中甲基对苯二酚单元浓度的增加，三聚反应是有利的。还使用广角X射线衍射研究了聚合物的结晶度。 （C）2005 Wiley期刊公司

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