溶剂梯度淋洗法表征无规共聚聚丙烯管材专用树脂  

Characterization of Ethylene Distribution in Propylene Based Copolymer by Solvent-Gradient Elution Fractionation

作　　者：郭梅芳[1] 张京春[2] 黄红红[2] 侯莉萍[2] 李前树[1] 

机构地区：[1]北京理工大学理学院,北京100081 [2]北京化工研究院,北京100013

出　　处：《石油化工》2005年第2期173-175,共3页Petrochemical Technology

摘　　要：采用溶剂梯度淋洗法(SGEF)对无规共聚聚丙烯管材专用树脂(PPR)进行了结构分级,用凝胶渗透色谱仪及核磁共振波谱仪分析了级分试样的相对分子质量及乙烯含量,并对级分加和后的相对分子质量分布与未分级的原样进行了对比,探讨了SGEF方法的可行性。得到的数据在一定程度上可以定量地给出PPR中乙烯的分布情况。Random ethylene-propylene copolymer resin (PPR) used in manufacturing pipes was fractionated by means of solvent-gradient elution fractionation (SGEF). Relative molecular mass distribution (MWD) of graded fractions was measured by gel permeation chromatography (GPC). MWD of original sample was compared with MWD of summation of fractions. Application of SGEF in fractionation of PPR was acceptable. Ethylene content in each fraction was given by 13C nuclear magnetic resonance (NMR). Ethylene distribution in different graded fractions was not uniform.

关 键 词：溶剂梯度淋洗 无规共聚聚丙烯 树脂 表征 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]