中国塑料 ›› 2021, Vol. 35 ›› Issue (4): 86-92.DOI: 10.19491/j.issn.1001-9278.2021.04.015

• 塑料与环境 • 上一篇    下一篇

回收聚对苯二甲酸丁二醇酯的强韧化与耐热改性

操莹, 徐鹏武(), 吴保钩, 杨伟军, 马丕明   

  1. 江南大学化学与材料工程学院,江苏 无锡 214122
  • 收稿日期:2020-11-25 出版日期:2021-04-26 发布日期:2021-04-21
  • 基金资助:
    江苏省自然科学基金青年项目(BK20200606)

Reinforcement, Toughening and Heat⁃resistant Modification of Recycled Poly(butylene terephthalate)

CAO Ying, XU Pengwu(), WU Baogou, YANG Weijun, MA Piming   

  1. School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China
  • Received:2020-11-25 Online:2021-04-26 Published:2021-04-21
  • Contact: XU Pengwu E-mail:pengwuxu@jiangnan.edu.cn

摘要:

以回收聚对苯二甲酸丁二醇酯(r-PBT)为原料,通过反应性熔融共混制备了r-PBT/环氧化弹性体(EVMG)共混物,并研究了EVMG添加量对r-PBT力学性能的影响规律。结果表明,当EVMG质量分数为20 %时,EVMG能够均匀分散于r-PBT中,粒径仅为500 nm,致使r-PBT的缺口冲击强度提高了14倍,断裂伸长率提高了7倍;进一步添加玻璃纤维 (GF),使r-PBT/EVMG共混物的拉伸强度和耐热性显著提高;与纯r-PBT相比,添加质量分数为30 % GF后的r-PBT/EVMG/GF共混物在保持高韧性的同时,拉伸与弯曲强度提高70 %以上,且共混物的热变形温度达到176 ℃,为回收PBT材料的高值再利用提供了新方法。

关键词: 回收聚对苯二甲酸丁二醇酯, 环氧化弹性体, 增韧, 耐热

Abstract:

The recycled poly(butylene terephthalate)r-PBT)/epoxidized elastomer (EVMG) blends were prepared by a reactive melt blending method using r-PBT as a raw materials. The effect of EVMG on the mechanical properties of r-PBT blends was studied systematically. The results indicated that EVMG was uniformly dispersed in the r-PBT matrix and its particle diameter was determined to be 500 nm. The notched impact strength and the elongation at break of the r-PBT)/ EVMG) blends increased by 14 times and 7 times at an EVMG content of 20 wt%, respectively. Furthermore, glass fibers (GF) were incorporated to improve the mechanical strength and heat resistance of the blends. After adding 30 wt% GF, the tensile strength and flexural strength of r-PBT/EVMG/GF composites increased by 70 % with good toughness maintained. In addition, the thermal deformation temperature of the blends increased up to 176 ℃. This work provides a new idea for the reuse of r-PBT.

Key words: recycled poly(butylene terephthalate), epoxidized elastomer, toughening, heat-resistance

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