Effect of metallic salts of malonic acid on the formation of β crystalline form in isotactic polypropylene

被引：17

作者：

Dou, Qiang ^{[1
]}

Lu, Qu-Liang ^{[1
]}

Li, Huai-Dong ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Mat Sci & Engn, Dept Polymer Sci, Nanjing 210009, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2008年 / 47卷 / 05期

关键词：

beta crystalline form; crystallization; malonic acid; polymorphism; polypropylene;

D O I：

10.1080/00222340802216053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effects of malonic acid and the lithium, sodium, potassium, zinc, magnesium, calcium, strontium, and barium salts of malonic acid on the formation of crystalline form in isotactic polypropylene at the crystallization temperatures 120 and 130 degrees C have been investigated. It was found that malonic acid and the lithium, sodium, and potassium salts of malonic acid inhibit the formation of beta crystalline form in polypropylene. Zinc malonate has a limited positive effect on the formation of beta crystalline form, while magnesium, calcium, strontium, and barium salts are beta nucleating agents, in descending order. The decreased beta nucleation abilities of the alkaline earth metallic salts of malonic acid are attributed to the increasing atomic radii of the combined metals and decreasing crystallization temperatures.

引用

页码：900 / 912

页数：13

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