聚偏氟乙烯发泡行为的研究  

Study on Foaming Behavior of Poly(vinylidene fluoride)

作　　者：王明昊 魏诗艺 贾舒雅 韩小龙 周洪福[1,2] 王向东 叶志殷[1,2] WANG Minghao;WEI Shiyi;JIA Shuya;HAN Xiaolong;ZHOU Hongfu;WANG Xiangdong;YE Zhiyin(School of Materials and Mechanical Engineering,Beijing Technology and Business University,Beijing 100048,China;Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics,Beijing 100048,China)

机构地区：[1]北京工商大学材料与机械工程学院,北京100048 [2]塑料卫生与安全质量评价技术北京市重点实验室,北京100048

出　　处：《中国塑料》2019年第10期35-39,53,共6页China Plastics

基　　金：大学生科学研究与创业行动计划（G028）;北京工商大学2019年“科创杯”学术科技立项

摘　　要：以聚偏氟乙烯(PVDF)为基体,加入不同含量的聚乙烯吡咯烷酮(PVP),经熔融共混后,制备PVDF/PVP共混物。然后,以超临界二氧化碳(CO2)为物理发泡剂,通过间歇式釜压发泡法制备高发泡倍率的PVDF/PVP泡沫。结果表明,随着PVP含量的增加,PVDF的结晶温度从137.3℃降到120.8℃,熔融温度略有下降,结晶度从39.5%下降到了32.1%;随着PVP含量和发泡温度的增加,泡孔尺寸和发泡倍率逐渐增加,泡孔密度略有下降;随发泡压力的增加,泡孔尺寸逐渐减小,泡孔密度和发泡倍率逐渐增加。Poly(vinylidene fluoride)(PVDF)/poly( N -vinyl pyrrolidone)(PVP) blends were prepared by a melt-blending method, and their crystallization and melting behaviors were investigated intensively. The results indicated that the crystallization temperature of PVDF domain decreased from 137.3 to 120.8 ℃ with an increase of PVP content, its crystallinity decreased from 39.5 % to 32.1 %, and its melting temperature was found to decrease slightly. The PVDF/PVP blends were further foamed using supercritical carbon dioxide as a physical foaming agent in autoclave. The investigation on forming performance demonstrated that the cell size and volume expansion ratio of the PVDF/PVP foams increased gradually with increasing the content of PVP and foaming temperature, and their cell density decreased slightly. Moreover, the cell size and cell density of the foams decreased with an increase of foaming pressure, but their volume expansion ratio was improved gradually.

关 键 词：聚偏氟乙烯 聚乙烯吡咯烷酮 超临界二氧化碳 发泡 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]