摘要
采用熔融共混的方法将高密度聚乙烯(HDPE)5000S与自制的分子链调控聚乙烯(CMPE)共混制备得到了一系列分子量分布(MWD)不同的双峰聚乙烯(BPE)共混物。对共混物进行普通DSC、连续自成核退火热分级技术(SSA)、等温结晶等一系列测试。结果表明,CMPE的加入有利于提高5000S的结晶能力,能加快其结晶速度,并在一定程度上完善其晶体结构。同时在CMPE含量适当时,共混物厚晶片的厚度和厚晶片含量不会发生显著的降低。
Polyethylene blends with bimodal molecular weight distribution（MWD） characteristics were prepared by blending high density polyethylene （HDPE）5000S with controlled-molecular polyethylene （CMPE）. Thermal fractionation（SSA） and isothermal crystallization of 5000S/CMPE blends were investigated by differential scanning calorimetry （DSC）. The results show that the addition of CMPE can accelerate the crystallization speed , obviously elevate the crystallization ability, and improve the crystal structure of 5000S in some degree. At the same time, the thickness and the content of thicker lamellae don＇ t have significant change when the content of CMPE is appropriate.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第9期32-35,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51073109)
关键词
双峰聚乙烯
差示扫描量热分析
热分级
等温结晶
bimodal polyethylene
differential scanning calorimetry
thermal fractionation
isothermal crystallization
