摘要
采用溶剂梯度分级结合凝胶渗透色谱(GPC)、核磁共振碳谱(^(13)C-NMR)、差示扫描量热仪(DSC)等分析表征方法对利安德巴塞尔公司的高密度耐热聚乙烯管材树脂(PE-RT)4731B的分子链结构及聚集态结构进行了分析。结果表明,该PE-RT的结晶度为63%,晶片厚度31 nm;相对分子质量呈双峰分布,相对分子质量分布达到18.0,低相对分子质量部分的重均相对分子质量(Mw)为4.0×10~3~3.0×10~4,高相对分子质量部分的Mw为3.0×10~5~6.0×10~5;短支链均匀分布于高分子链上,共聚单体含量高于1.25%;高低相对分子质量组分配比为(50~55):(45~50)。
The molecular and crystalline structures of Lyondell Basel Company＇s high density heatresistant polyethylene pipe resin 4731B were analyzed by solvent gradient classification combined with gel permeation chromatography （GPC）, carbon nuclear magnetic resonance （13 C-NMR）, differential scanning calorimeter （DSC）. It was found that the crystallinity was 63＆, the chip thickness was 31 nm; the molecular weight distribution was bimodal, MWD was 18.0, Mw of low molecular weight part was 4.0 ×10^3 -3.0×10^4 , that of high molecular weight part was 3.0×10^6.0×10^5. Short branched chains evenly distributed in the higher polymer chains, comonomer content is more than 1.25 %. Ratio of high and low molecular weight components was （50-55） ： （45-50）.
出处
《中国塑料》
CAS
CSCD
北大核心
2016年第2期24-27,共4页
China Plastics
关键词
高密度耐热聚乙烯
管材树脂
溶剂梯度分级
分子链结构
high density heat-resistant polyethylene
pipe resin
solvent gradient classification
molecular chain structure
