苯乙烯接枝改性聚丙烯制备及其性能

doi:10.3969/j.issn.0438-1157.2013.z1.027

化工学报 ›› 2013, Vol. 64 ›› Issue (S1): 175-181.DOI: 10.3969/j.issn.0438-1157.2013.z1.027

• 材料化学工程与纳米技术 • 上一篇下一篇

苯乙烯接枝改性聚丙烯制备及其性能

王卫霞, 周帅, 石尧麒, 辛忠

华东理工大学化工学院产品工程系, 化学工程联合国家重点实验室, 上海 200237

收稿日期:2013-06-24 修回日期:2013-09-09 出版日期:2013-12-30 发布日期:2013-12-30
通讯作者: 辛忠
作者简介:王卫霞(1987—)，女，博士研究生。
基金资助:
国家自然科学基金项目(V1162110)；中央高校基础研究基金项目(WA1314051，WA1013012)。

Preparation and properties of polypropylene modified by grafting styrene

WANG Weixia, ZHOU Shuai, SHI Yaoqi, XIN Zhong

State Key Laboratory of Chemical Engineering, Department of Product Engineering, College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2013-06-24 Revised:2013-09-09 Online:2013-12-30 Published:2013-12-30
Supported by:
supported by the National Natural Science Foundation of China (V1162110).

摘要/Abstract

摘要： 以过氧化苯甲酰为引发剂，采用反应挤出法将苯乙烯(St)接枝到等规聚丙烯(iPP)上，并考察了St浓度对接枝PP结晶性能、流变性能和发泡性能的影响。由FTIR、GPC和MFR表征结果表明St成功接到PP上；DSC结果表明，接枝PP结晶峰值温度与iPP相比最大提高了15.4℃；由剪切流变测试结果，在低频区，接枝PP的G'值增大，出现明显的剪切变稀现象，tan δ-ω曲线中出现平台，说明接枝PP中有长支链结构的存在；由于接枝PP的熔融流动速率降低即熔体强度提高，使得接枝PP的泡孔更规则。

关键词: 苯乙烯, 接枝聚丙烯, 发泡

Abstract: With benzoyl peroxide as initiator, melt isotatic polypropylen (iPP) was grafted with styrene (St) by reactive extrusion process. The effects of St concentration on oscillatory shear rheology, foaming and thermal properties were comparatively evaluated. That Sts were grafted onto PP was comfirmed by FTIR, GPC and MFR. The results of DSC showed that the crystallization temperatures of grafted PPs were higher than that of iPP (maximum 15.4℃). The rheological characteristics of grafted PPs such as higher storage modulus (G'), the obvious shear thinning, a plateat in tan δ-ω plot at low frequency proved that the long chain branches have been added to the PP molecules. As the melt flow rate of grafted PP was reduced, i.e. the melt strength increased, the bubble pore of grafted PP was more regular than that of iPP.

Key words: styrene, grafted polypropylen, forming

中图分类号:

TQ316.6

王卫霞, 周帅, 石尧麒, 辛忠. 苯乙烯接枝改性聚丙烯制备及其性能[J]. 化工学报, 2013, 64(S1): 175-181.

WANG Weixia, ZHOU Shuai, SHI Yaoqi, XIN Zhong. Preparation and properties of polypropylene modified by grafting styrene[J]. CIESC Journal, 2013, 64(S1): 175-181.

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苯乙烯接枝改性聚丙烯制备及其性能

Preparation and properties of polypropylene modified by grafting styrene

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