聚丙烯/β-环糊精复合材料发泡性能及力学性能的研究

doi:10.11896/cldb.18120190

材料导报

2020, Vol. 34

Issue (4): 4148-4152 https://doi.org/10.11896/cldb.18120190

高分子与聚合物基复合材料

聚丙烯/β-环糊精复合材料发泡性能及力学性能的研究

张恒¹, 周玉惠¹, 张飞¹, 龚维^2,3, 何力^1,3

1 贵州大学材料与冶金学院,贵阳 550025;
2 贵州师范大学材料与建筑工程学院,贵阳 550025;
3 国家复合改性聚合物材料工程技术研究中心,贵阳 550014

Studies on Foaming Properties and Mechanical Properties of Polypropylene/β-Cyclodextrin Foamed Composite

ZHANG Heng¹, ZHOU Yuhui¹, ZHANG Fei¹, GONG Wei^2,3, HE Li^1,3

1 The Institute of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;
2 The Institute of Materials and Construction, Guizhou Normal University, Guiyang 550025, China;
3 National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China

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摘要以β-环糊精(BC)为成核剂,通过微孔注塑发泡工艺制备了发泡聚丙烯(PP)复合材料。采用差示扫描量热仪(DSC)、扫描电子显微镜(SEM)等技术,研究了不同含量BC (0.25%～7%,质量分数,下同) 对发泡聚丙烯复合材料发泡性能及力学性能的影响。结果表明:随着BC的加入,PP的发泡性能得到明显改善。添加7%的BC可以得到理想的泡孔形貌,泡孔直径为27.17 μm,密度达1.23×10⁷ cell/cm³。BC的加入使PP的结晶温度、结晶速率、粘度均有明显改善,有利于PP在更高温度下结晶并防止泡孔坍塌和并泡。与发泡聚丙烯材料相比,发泡PP/BC复合材料的拉伸、弯曲、冲击强度分别提高了21.2%、7%、12%。

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关键词: 聚丙烯微孔发泡 β-环糊精发泡性能力学性能复合材料

Abstract: In this study, polypropylene(PP) foamed composite was prepared using β-cyclodextrin (BC) as nucleating agent through a microcellular injection molding foaming process. The paper studied the effect of different contents of BC (0.25%—7%) on foamed PP composite’s foaming properties and mechanical properties by electron microscopy and differential scanning calorimeter. The results showed that the foaming behavior of PP was significantly improved with the BC content increasing. When BC content was 7%, the ideal cell morphology was obtained, the average diameter was 27.17 μm and the density was 1.01×10⁷ cell/cm³. It was found that the crystallization temperature, crystallization rate of PP could be obviously improved by adding BC, which was advantageous to the crystallization of PP at higher temperature, and prevented the cell collapsing and dipping. Compared with polypropylene foaming materials, the tensile, bending and impact strength of foamed PP/BC composites increased by 21.2%, 7% and 12% respectively.

Key words: polypropylene microcellular foam β-cyclodextrin foaming property mechanical properties composite materials

出版日期: 2020-02-25 发布日期: 2020-01-15

ZTFLH:

TB324

基金资助: 黔科合人才[2016]5673号;黔科服企[2018]4010号;黔科合平台人才[2017]5788号

通讯作者: lihe@gzu.edu.cn

作者简介: 张恒,毕业于重庆交通大学,现为贵州大学材料与冶金学院研究生,主要从事聚合物结构与性能的研究;何力,西安交通大学材料科学与工程博士,现从事聚合物发泡及工业化应用。先后在国内外学术刊物上发表学术论文50余篇。

引用本文:

张恒, 周玉惠, 张飞, 龚维, 何力. 聚丙烯/β-环糊精复合材料发泡性能及力学性能的研究[J]. 材料导报, 2020, 34(4): 4148-4152.
ZHANG Heng, ZHOU Yuhui, ZHANG Fei, GONG Wei, HE Li. Studies on Foaming Properties and Mechanical Properties of Polypropylene/β-Cyclodextrin Foamed Composite. Materials Reports, 2020, 34(4): 4148-4152.

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http://www.mater-rep.com/CN/10.11896/cldb.18120190 或 http://www.mater-rep.com/CN/Y2020/V34/I4/4148

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