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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:

2022年1期

页码:

35-39

栏目:

出版日期:

2022-01-15

文章信息/Info

Title:

Preparation and properties of waste rubber powder/polypropylene grafting material blends

作者:

邹 亮; 陶国良

常州大学 材料科学与工程学院， 江苏 常州 213164

Author(s):

ZOU Liang;  TAO Guo-liang

School of Material Science and Engineering, Changzhou University, Changzhou 213164, China

关键词:

废胶粉; 聚丙烯; 接枝料; 共混材料; 力学性能; 流变性能

Keywords:

waste rubber powder;  polypropylene;  grafting material;  blends;  mechanical property;  rheological property

分类号:

-

DOI:

10.19908/j.cnki.ISSN1000-1255.2022.01.0035

文献标识码:

-

摘要:

采用熔融接枝法分别制备了高强度和高熔体流动速率的聚丙烯接枝马来酸酐共聚物，以改善聚丙烯与胶粉间的界面相容性，提高废胶粉/聚丙烯接枝物共混材料的力学性能和流动性。力学性能测试结果表明，随着废胶粉用量的增加，废胶粉/聚丙烯接枝物共混材料的拉伸性能下降，扯断伸长率和缺口冲击强度均增大，熔体流动速率减小，流动性变差。由热重分析可知，随着废胶粉用量的增加，共混材料的热稳定性提高，降解速率下降。由流变性能测试可知，在废胶粉用量保持不变时，随着角频率的增加，共混材料的复数黏度下降，损耗模量和储能模量均趋于增大；在角频率不变时，随废胶粉用量增加，共混材料的复数黏度、储能模量和损耗模量均增大。由微观形貌可以看出，废胶粉用量越多共混材料的相容性越好。拉伸强度达到8.35 MPa以上,扯断伸长率最高达到81%，熔体流动速率指数达到2.74 g/10 min以上，缺口冲击强度最高达到15.6 kJ/m2。

Abstract:

Polypropylene grafted maleic anhydride copolymers with high strength and high melt flow rate were prepared by melt grafting method to improve the interfacial compatibility between polypropylene and waste rubber powder, and improve the mechanical properties and fluidity of waste rubber powder/polypropylene grafted copolymer blends. The results showed that with increase of the amount of waste rubber powder, the tensile properties of waste rubber powder/polypropylene grafted copolymer blends decreased, elongation at break and notched impact strength increased, melt flow rate decreased and fluidity became worse. Thermogravimetric analysis characterized that thermal stability of the blends increased and degradation rate decreased with increasing waste rubber powder amount. Rheological property test showed that when waste rubber powder amount was constant, with increase of the angular frequency, complex viscosity of the blends decreased, and loss modulus and storage modulus tended to increase. When the angular frequency was constant, the complex viscosity, storage modulus and loss modulus of the blends increased with increase of waste rubber powder amount. It could be seen from the section morphology of the blends that the more amount of waste rubber powder, the better compatibility of the blends. The tensile strength was more than 8.35 MPa, maximum elongation at break was 81%, melt flow rate was more than 2.74 g/10 min, and the maximum notched impact strength reached 15.6 kJ/m2.

参考文献/References

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备注/Memo

备注/Memo:

国家自然科学基金资助项目（21704008）

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更新日期/Last Update: 2022-01-15