INFLUENCE OF MOLECULAR-MASS, THERMAL-TREATMENT AND NUCLEATING-AGENT ON STRUCTURE AND FRACTURE-TOUGHNESS OF ISOTACTIC POLYPROPYLENE

被引：63

作者：

AVELLA, M ^{[1
]}

DELLERBA, R ^{[1
]}

MARTUSCELLI, E ^{[1
]}

RAGOSTA, G ^{[1
]}

机构：

[1] IST RIC TECNOL POLIMERI & REOL,CNR,VIA TOIANO 6,ARCO FELICE,I-80072 NAPLES,ITALY

来源：

POLYMER | 1993年 / 34卷 / 14期

关键词：

FRACTURE TOUGHNESS; POLYPROPYLENE; THERMAL TREATMENT;

D O I：

10.1016/0032-3861(93)90620-P

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 influence of processing, crystallization conditions and molecular characteristics on the fracture behaviour of isotactic polypropylene obtained by a new catalyst system was investigated. The sample specimens were prepared by using two extreme crystallization conditions - quenching or slow crystallization - in order to obtain crystals and amorphous phases with different structure. Interesting correlations between fracture parameters and some morphological parameters such as long spacing and lamellar thickness of the samples were found. The SEM fractographic analysis provides useful information on the influence of factors such as molecular weight, spherulite size and undercooling. Nucleating agents were used to tailor the dimensions of spherulites.

引用

页码：2951 / 2960

页数：10

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