基于吸附色谱的分级技术在聚烯烃表征中的应用
Application of Fractionation Technique Based on Absorption Chromatography in Polyolefin Characterization
杜斌 1陈商涛 1李荣波1
作者信息
- 1. 中国石油天然气股份有限公司石油化工研究院,北京 102206
- 折叠
摘要
聚烯烃树脂具有复杂的化学组成和链结构,液相分级技术是有效识别其精细结构的常用表征手段.相对使用较为广泛的结晶分级技术,高温-温度梯度相互作用色谱技术(HT-TGIC),作为一种最新的分级方法,具有可分析无定形聚烯烃样品的优势,大大拓宽了分级技术在聚烯烃树脂中的应用范围.本文列举了温度梯度相互作用色谱(TGIC)在聚烯烃表征中的典型案列,特别是针对结晶分级技术局限的低结晶度/无定形聚烯烃树脂.基于TGIC与凝胶渗透色谱(GPC)技术的联用分析,揭示了聚烯烃材料链结构的二维信息,为性能优异的新型聚烯烃材料研发与设计提供支撑和指导.
Abstract
Liquid chromatography fractionation technique is a typical characterization method for efficiently deter-mining the fine structure of polyolefin resins,which have complex chemical composition distribution and chain structures.Compared with the widely used crystallization-based fractionation techniques,high temperature-tem-perature gradient interaction chromatography(HT-TGIC),as a novel fractionation method,holds great advan-tages in analyzing amorphous polyolefins,thus broadening the application of fractionation techniques in polyole-fin resins.In this paper,typical applications of HT-TGIC in the polyolefin characterization were demonstrated,especially for low crystallinity/amorphous polyolefin resins that are limited by crystallization fractionation tech-niques.And more information about bivariate chain structures of polyolefin could be revealed by TGIC coupled with GPC technology.This could provide support and guidance for the development and design of new polyolefin materials with excellent performance.
关键词
聚烯烃/化学组成分布/温度梯度相互作用色谱/分级/吸附Key words
Polyolefins/Chemical composition distribution/Thermal gradient interaction chromatography/Frac-tionation/Adsorption引用本文复制引用
出版年
2023
NETL
NSTL
维普
万方数据