摘要
采用不同预处理条件对聚对苯二甲酸乙二醇酯(PET)切片进行熔融混炼,考察了不同熔融混炼条件下PET的降解行为和结晶行为。结果表明,不同条件的熔融混炼过程均导致PET降解,而降解速率和样品含水率密切相关;PET的降解不仅导致其结晶速率提高,也将导致其球晶晶片厚度增加和结晶度增大;PET的结晶峰值温度(Tcp)、结晶起始温度(Tonset)和结晶结束温度(Tendset)与其特性黏度[η]之间存在相关关系,表现为[η]越小,Tcp越高,结晶速率越快。
The degradation and crystallization behavior of poly （ethylene terephthalate） under different melt-mixing conditions were investigated. PET chips were degraded to various degrees at different pretreatment conditions. The degradation rate was closely related to the water content; degradation not only led to an improvement of crystallization rate, but also resulted in a thickening of crystal lamella and increase of crystallinity. The crystallization peak temperature （Top）, initial temperature （Ton~）, end temperature （T^ndse~）, and intrinsic viscosity showed good correlations. When intrinsic viscosity decreased, those temDeratnro nn,t 11：~：
出处
《中国塑料》
CAS
CSCD
北大核心
2013年第5期39-43,共5页
China Plastics
关键词
聚对苯二甲酸乙二酯
降解
特性黏度
结晶行为
poly（ethylene terephthalate）degradatiom intrinsic viscosity crystallization
