INFLUENCE OF THE SIZE OF ULTRAFINE CaCO3 POWDER ON PP CRYSTALLIZATION

YANG Jun; LIU Wanjun; CHEN Guangxin; LIU Jingjiang

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INFLUENCE OF THE SIZE OF ULTRAFINE CaCO3 POWDER ON PP CRYSTALLIZATION

Research Bulletin | 更新时间：2021-03-19

- INFLUENCE OF THE SIZE OF ULTRAFINE CaCO3 POWDER ON PP CRYSTALLIZATION
- Acta Polymerica Sinica Issue 3, Pages: 383-386(2001)
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- Published：20 June 2001，
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YANG Jun, LIU Wanjun, CHEN Guangxin, LIU Jingjiang. INFLUENCE OF THE SIZE OF ULTRAFINE CaCO3 POWDER ON PP CRYSTALLIZATION. [J]. Acta Polymerica Sinica (3):383-386(2001)
DOI：

YANG Jun, LIU Wanjun, CHEN Guangxin, LIU Jingjiang. INFLUENCE OF THE SIZE OF ULTRAFINE CaCO3 POWDER ON PP CRYSTALLIZATION. [J]. Acta Polymerica Sinica (3):383-386(2001) DOI：

摘要

碳酸钙 (ＣａＣＯ3 )填充聚丙烯 (ＰＰ)是一类用途广泛价格低廉的复合材料 .以往的研究主要集中在ＣａＣＯ3 改善ＰＰ的力学性能方面[1～3]

而对ＣａＣＯ3 ＰＰ复合材料结晶行为的报道较少 .Ｍａｉｔｉ等[4] 研究了ＰＰＣａＣＯ3 复合材料在 0～36ｖｏｌ%填料范围内的结晶行为 .结果表明

在低ＣａＣＯ3 含量( 0～ 4ｖｏｌ% )时

ＰＰ的结晶成核和生长速率降低

但是总的结晶度稍有增加 ;在中等含量( 4ｖｏｌ%～165ｖ....

Abstract

The effects of CaCO3 on the crystallization behavior of polypropylene (PP) were studied by means of DSC and WAXD．The average sizes of the CaCO3 powders used were 0.1 μm (UC) and 0.5μm (Gc)

respectively．The PP／CaCO3 composites at compositions of 1 phr and 10 phr were investigated．The results showed that the addition of CaCO3 reduced the supercooling

the rate of nucleation and the overall rate of crystallization (except for the 10 phr UC/PP sample)．The crystallinity of PP was increased and the size distribution of the crystallites of α-PP was broadened．On the other hand

the crystallization rate of 10 phr UC／PP is 1.5 times higher than that of neat PP．It has an overall rate of crystallization 2 times as much as that of the neat PP and has the maximum crystallinity．The sizes of crystallites and the unit cell parameters of α-PP were varied by the addition of CaCO3．β-PP was formed by addition of GC and was not detected by addition of UC．The differences of crystallization behaviors of PP might be attributed to the combined effects of the content and size of CaCO3 filled．

关键词

聚丙烯CaCO3粉末结晶

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Related Institution

Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology

1,2),GAO Xueqin~2,YUAN Yi~2,SHEN Kaizhi~2

四川大学高分子科学与工程学院高分子材料工程国家重点实验室

四川大学高分子科学与工程学院高分子材料工程国家重点实验室成都

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