PPS/PEEK共混物多次DSC扫描中PPS结晶行为  

Crystallization Behavior of Polyphenylene Sulfide in DSC Multi scanning of its Blends with Polyether Ether Ketone

作　　者：麦堪成[1] 梅震[1] 曾汉民[1] 

机构地区：[1]中山大学材料科学研究所/国家教委聚合物复合材料与功能材料开放实验室,广州510275

出　　处：《中山大学学报（自然科学版）》1999年第6期39-43,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家教委跨世纪优秀人才培养计划基金

摘　　要：聚苯硫醚(PPS)及其与聚醚醚酮(PEEK)共混物DSC多次升降温扫描表明,同一PPS样品在多次扫描过程中从不同温度下降温结晶,结晶温度(θc)明显不同,归结于PPS自成核作用的存在和其分子结构的变化.共混物中PPS组分的熔点(θmp)虽然有所降低,但由于PEEK对PPS结晶有促进作用,PPS组分θc明显地比纯PPS的高,结晶热与生成结晶的熔融热(结晶度)增加,归结于PPS与PEEK界面相互作用引起高温下异相成核,可结晶部分增加,结晶加快.Crystallization behavior of polyphenylene sulfide(PPS) and its blends with polyether ether ketone (PEEK) were investigated by means of multi scanning of heating cooling cycles of differential scanning calorimetry It was found that crystallization temperature( θ c) of PPS crystallized dynamically from 320 at cooling rate of 20 ℃/min was always higher than that of 400 ℃, attributed to the presence of self nucleation of PPS Addition of PEEK decreased the melting temperature of PPS PEEK had an accelarating effect on PPS crystallization and a significant increase in θ c was observed due to the heterogeneous nucleation arising from the interfacial interaction between two components in the blends PPS component in the blends crystallized from 320 ℃ also exhibit a higher θ c than that of 400 ℃ It was observed that a heterogeneous nucleation of annealed PEEK was higher than that of newly crystallized PEEK A decrease in θ c of PPS component crystallized from 400 ℃ was more significant than that of 320 ℃ with increasing the DSC scanning number θ c of PPS in the blends crystallized from 400 ℃ increased as the PEEK content increased

关 键 词：聚苯硫醚 PPS PEEK 共混物 结晶行为 DSC 

分 类 号：O632.32[理学—高分子化学] TQ326.5[理学—化学]