摘要
采用微型注塑加工新技术制备了聚乳酸(PLA)/聚己内酯(PCL)微型制品,研究了微注塑加工过程中注射速度和模具温度对PLA/PCL微型样品的相态、取向及结晶行为的影响。结果表明,适当增加注射速度和模具温度有利于PCL分散相相畴尺寸的减小,过多增加注射速度反而会导致分散相相畴尺寸增大。适当增加注射速度和模具温度也有利于PCL分散相的取向,而过多增加模具温度会使PCL分散相的取向程度降低。此外,注射速度对PLA和PCL结晶度的影响比模具温度大。
The novel microinjection molding processing technology was adopted to prepare poly（lactic acid）（PLA）/polycaprolactone（PCL）micropart.Then,scanning electronic microscope（SEM）,wide angle X-ray diffractometer（WAXD）and differential scanning calorimeter（DSC）were used to investigate the influence of injection speed and mold temperature on the morphology,orientation and crystallization behavior of micropart during microinjection molding process.The results showed that proper increasing injection speed and mold temperature was advantageous to the decrease in the domain size of PCL dispersed phase.However,the excessive increase in injection speed would lead to the increase in the domain size of PCL dispersed phase instead.It was also found that the proper increase in injection speed and mold temperature was also beneficial to the orientation of PCL dispersed phase.However,the excessive increase in mold temperature would result in the decrease in the orientation degree.In addition,the injection speed showed more obvious influence on the crystallinity of PLA and PCL than mold temperature.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第5期209-211,214,共4页
New Chemical Materials
基金
国家自然科学基金(51010004、51433006)
高等学校学科创新引智计划(B13040)
关键词
微型注塑
聚乳酸
聚己内酯
注射速度
模具温度
microinjection molding
poly（lactic acid）
polycaprolactone
injection speed
mold temperature
