引用本文:
周丽云, 盛寿日, 蔡明中, 宋才生. 二苯醚-对苯二甲酰氯-4,4'-二苯氧基二苯砜三元共聚物的合成与性能[J]. 应用化学,
1998, 15(5): 6-9.
Citation: Zhou Liyun, Sheng Shouri, Cai Mingzhong, Song Caisheng. Synthesis and Properties of PEKK/PESEKK Copolymers[J]. Chinese Journal of Applied Chemistry, 1998, 15(5): 6-9.
Citation: Zhou Liyun, Sheng Shouri, Cai Mingzhong, Song Caisheng. Synthesis and Properties of PEKK/PESEKK Copolymers[J]. Chinese Journal of Applied Chemistry, 1998, 15(5): 6-9.
二苯醚-对苯二甲酰氯-4,4'-二苯氧基二苯砜三元共聚物的合成与性能
摘要:
以无水AlCl3/ClCH2CH2Cl/NMP为催化剂/溶剂体系,通过缩聚反应,由二苯醚,对苯二甲酰氯和4,4'-二苯氧基二苯砜合成了聚醚酮酮和聚醚砜醚酮酮共聚物(PEKK/PESEKK).考察了单体浓度、反应时间对聚合物分子量的影响,并对其进行了IR、DSC、WAXD等分析表征.结果表明,共聚物具有优异的耐热性,随着共聚物中PESEKK单元含量的增加,其玻璃化温度逐渐升高,而熔融温度和结晶度逐渐降低.与聚醚酮酮(PEKK)相比,共聚物的断裂伸长率明显提高,而拉伸强度和拉伸模量却有所下降,但仍具有良好的力学性能.
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关键词:
- 聚醚酮酮/聚醚砜醚酮酮共聚物
- / 合成
- / 热性能
- / 力学性能
English
Synthesis and Properties of PEKK/PESEKK Copolymers
Abstract:
PEKK/PESEKK copolymers of high molecular weight have been synthesized by solution polycondensation of diphenyl ether, terephthaloyl chloride and 4,4'-diphenyoxydiphenyl sulfone in a catalyst/solvent system of AlCl3/ClCH2CH2Cl/NMP. The effects of monomer molarity and reaction time on copolymer molecular weight are studied. The copolymers have been characterized by IR, DSC and WAXD. The results indicate that the copolymers exhibit excellent heat-resistance. Raising PESEKK content in the copolymer increases the Tg of the copolymer, but decreases its Tm and crystallinity. The elongation at break of the copolymer is much higher than that of PEKK, but the tensile modulus and tensile strength are lower than those of PEKK.
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