中国塑料2025，Vol.39Issue(2)：6-11,6.DOI:10.19491/j.issn.1001-9278.2025.02.002
双螺杆反应挤出长支链接枝对宽分子量分布聚丙烯性能的影响
Effect of chain-branched structure on properties of polypropylene with broad molecular weight distribution based on twin-screw reactive extrusion
许巍 1吕明福 1杜文杰 1郭鹏 1徐耀辉1
作者信息
- 1. 中国石化北京化工研究院,北京 100013
- 折叠
摘要
Abstract
The polypropylene(PP)with a broad molecular weight distribution was used as a matrix for preparing long-branched chain PP due to its excellent mechanical properties and processability.The twin-screw reactive extrusion was carried out to prepare the long branched-chain PP,enhancing the production efficiency.Additionally,melt radical graft-ing was conducted at two different temperature.The effect of long chain-branched structure on the properties of PP was investigated by using gel permeation chromatography,Fourier-transform infrared spectroscopy,and rheometry to deter-mine the molecular weight and distribution,grafting degree,and tensile rheological behavior of the of the as-prepared PP.The mechanical test results indicated that the mechanical properties of the as-prepared PP decreased with an increase in the reaction temperature;however,its mechanical strength increased slightly with an increase in the content of long branched chains.The thermal analysis demonstrated that there was a significant increase in the crystallization tempera-ture of PP but a decrease in its degree of crystallinity with an increase in the content of long branched chains.The crystal-lization temperature was increased by 11℃at a processing temperature of 200℃and a monomer content of 4 wt%com-pared to pure PP.关键词
宽分子量分布/聚丙烯/双螺杆/反应挤出/长支链Key words
broad molecular weight distribution/polypropylene/twin-screw/reaction extrusion/long branched chain分类
化学工程引用本文复制引用
许巍,吕明福,杜文杰,郭鹏,徐耀辉..双螺杆反应挤出长支链接枝对宽分子量分布聚丙烯性能的影响[J].中国塑料,2025,39(2):6-11,6.
