CRYSTAF: Crystallization analysis fractionation. A new approach to the composition analysis of semicrystalline polymers

被引：87

作者：

Monrabal, B

机构：

[1] Polymer ChAR, Valencia Parc Tecnologic, 46980 Paterna

来源：

MACROMOLECULAR SYMPOSIA | 1996年 / 110卷

关键词：

D O I：

10.1002/masy.19961100107

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Crystallization Analysis Fractionation is a new technique for the analysis of composition distribution in semicrystalline polymers; more specifically for the analysis of branching distribution in Polyethylene and tacticity in Polypropylene type resins. CRYSTAF as well as TREF (Temperature Rising Elution Fractionation) are separation techniques which fractionate species of differing crystallizability by slow cooling of a polymer solution. TREF however, demands in addition to the crystallization step a second temperature cycle, elution step, to obtain the polymer composition. CRYSTAF, on the other hand, extracts the information in the crystallization cycle by monitoring the solution concentration depression as temperature goes down; thus reducing significantly the analysis time and simplifying the hardware needs. CRYSTAF principles are discussed and various applications are described.

引用

页码：81 / 86

页数：6