中国塑料2024，Vol.38Issue(4)：1-5,5.DOI:10.19491/j.issn.1001-9278.2024.04.001
共聚焦拉曼成像技术研究PE-LD/EVOH共混物的三维相结构
Study on 3D phase structure in low density polyethylene/ethylene-vinyl alcohol copolymer(PE-LD/EVOH)blends through confocal Raman imaging
摘要
Abstract
The phase structure of polymer blends directly affects the macroscopic properties of the materials;therefore,it is important to investigate the size and spatial distribution of each phase.In this work,the confocal Raman imaging tech-nique was adopted to study the distribution of phases of PE-LD/EVOH blends in the horizontal and depth directions and 3D space in the compression-molded specimens.The phase structure of PE-LD/EVOH blends in 3D space was obtained at the first time,and the phase region visually corresponded to the chemical composition of the blends.The results indi-cated that the PE-LD/EVOH blends were immiscible system.20 wt%EVOH could be dispersed in the PE-LD matrix in a regular cylindrical form with a diameter of the cylinder in the range of 3～6 μm.The introduction of polyethylene grafted with maleic anhydride(PE-g-MAH)made the phase structure change significantly from the regular to irregular shape,and the cross-section size was reduced to 2 μm.This indicates that PE-g-MAH can enhance the compatibility be-tween PE-LD and EVOH significantly.关键词
拉曼成像/低密度聚乙烯/乙烯-乙烯醇共聚物/共混物/三维相结构Key words
Raman imaging/low-density polyethylene/ethylene-vinyl alcohol copolymer/blend/3D phase structure分类
化学化工引用本文复制引用
张春波,刘宣伯,姚雪容,苏萃,施红伟,张龙贵,张韬毅..共聚焦拉曼成像技术研究PE-LD/EVOH共混物的三维相结构[J].中国塑料,2024,38(4):1-5,5.基金项目
中国石化科技开发项目(420047-3) （420047-3）
