【摘要】 采用球磨机对聚氯乙烯(PVC)进行力化学改性,讨论了处理前后PVC结构的变化。在此基础上,经热致相分离(TIPS)法制备了力化学改性前后所得PVC的平板膜,应用FT-IR、DSC和SEM等进行分析,讨论了所得膜的结构与性能。结果表明,力化学改性减少了导致PVC难以加工的石榴状结构,降低了PVC微晶的完善程度;经力化学改性PVC制得的TIPS法平板膜纯水通量可达693.6L/(m2.h),较未经力化学改性PVC制得的TIPS法平板膜的水通量7.1L/(m2.h)有显著提高,膜的断裂强度也有所加强。更多还原

【Abstract】 The mechanochemical treatment of PVC was studied by ball mill and the structure changes of PVC was analyzed.Based on the research,the flat membranes were prepared using the PVC before and after mechanochemical treatment,respectively by thermally induced phase separation(TIPS) method.The structure and properties of membranes were studied by FT-IR,DSC and SEM.Results showed that the mechanochemical treatment eliminated the PVC pomegranate appearance structure which made PVC difficult to be processed,and the perfection of initial micro-crystal of PVC was also reduced.The water flux of the flat membrane built of PVC after mechanochemical treatment by TIPS method reached 693.6L/(m2·h) which was much higher than that built of PVC before mechanochemical treatment with the value of only 7.1L/(m2·h),and the fracture strength of the flat membrane was also increased.更多还原