摘要
通过偏光显微镜(POM)研究了不同相对分子质量的聚ε-己内酯(PCL)均聚物的结晶形态及PCL在不同相容共混体系中的结晶形态。分别讨论了相对分子质量对PCL均聚物结晶形态的影响;共混物、共混组成及结晶温度对PCL在相容共混体系中结晶形态的影响。结果表明:PCL的相对分子质量越大,形成的球晶尺寸越小;第二组分的加入有利于PCL形成环带球晶,且形成的环带球晶规整性受结晶组分的结晶速率与第二组分的扩散速率之间的匹配程度影响,匹配程度越高,形成的环带球晶越规整;在相容共混体系中,PCL的相对分子质量对共混体系结晶形态影响不大,但会影响形成的环带球晶的尺寸。
The authors studied the crystalline morphologies of poly（ε-capmlactone）（PCL） having different relative molecular mass and PCL in different compatible blending systems by means of polarized light microscope（PLM）. The influence of relative molecular mass on the crystalline morphology of PCL homopolymer, and the effects of the second component, composition of the blends and crystallization temperature on the crystalline morphology of PCL in compatible blends were studied. The results show that the higher the relative molecular mass of PCL, the smaller the size of the formed spherulite. The second component farm＇s the formation of PCL ring-banded spherulite. The regularity of the ring-banded spherulite so formed is dependent upon the matching relationship between the crystalline rate of PCL and the diffusion rate of the amorphous component in the blends. The higher the matching degree, the higher the regularity of the ring- banded spherulite. The relative molecular mass of PCL has little impact on the crystalline morphology of the blending system but can influence the size of the ring-banded spherulite in compatible blending systems.
出处
《合成树脂及塑料》
CAS
北大核心
2011年第6期46-50,共5页
China Synthetic Resin and Plastics
基金
国家自然科学基金项目(50621302)
关键词
聚Ε-己内酯
共混体系
结晶形态
poly（ε-caprolaetone）
blending system
crystalline morphology
