中国塑料 ›› 2022, Vol. 36 ›› Issue (3): 82-88.DOI: 10.19491/j.issn.1001-9278.2022.03.014

• 加工与应用 • 上一篇    下一篇

动态可逆交联聚氯乙烯的制备与二次加工测试

贾垚, 张泽, 余正发, 崔永岩()   

  1. 天津科技大学化工与材料学院,天津 300457
  • 收稿日期:2021-11-01 出版日期:2022-03-26 发布日期:2022-03-25
  • 通讯作者: 崔永岩(1965—),男,副教授,从事高分子材料改性及加工技术研究,cyy@tust.edu.cn
    E-mail:cyy@tust.edu.cn

Preparation and secondary processing test of dynamic reversible cross⁃linked poly(vinyl chloride)

JIA Yao, ZHANG Ze, YU Zhengfa, CUI Yongyan()   

  1. School of Chemical Engineering and Materials,Tianjin University of Science and Technology,Tianjin 300457,China
  • Received:2021-11-01 Online:2022-03-26 Published:2022-03-25
  • Contact: CUI Yongyan E-mail:cyy@tust.edu.cn

摘要:

选用α?硫代甘油和对1,4?苯二硼酸合成了二巯基对苯硼酸酯,采用熔融共混法使二巯基对苯硼酸酯与聚氯乙烯(PVC)进行交联,制备了具有动态可逆交联结构的PVC,通过红外和核磁共振氢谱分析,表征了二巯基对苯硼酸酯的结构,同时对合成的交联剂二巯基对苯硼酸酯进行热分析,验证了其用作PVC交联剂的可行性,进一步研究了交联PVC的化学结构、应力松弛、蠕变性能、力学性能和二次加工性。结果表明,二巯基对苯硼酸酯交联后的PVC样品在各项性能上均有提升,且PVC样品在凝胶度较高的条件下仍然能进行二次加工,加工后可保留90 %的原始力学性能。

关键词: 聚氯乙烯, 二巯基对苯硼酸酯, 可逆交联, 二次加工

Abstract:

Dimercapto?terephenylborate was synthesized using α?thioglycerol and 1,4?benzenediboronic acid as monomers, and it was cross?linked with poly(vinyl chloride) (PVC) through melt blending. The resultant PVC with a dynamic reversible cross?linking structure was analyzed by infrared spectroscopy and hydrogen nuclear magnetic resonance spectroscopy to confirm the structure of dimercapto?terephenylborate. Meanwhile, dimercapto?terephenylborate was thermally analyzed to verify its feasibility as a cross?linking agent for PVC. The chemical structure, stress relaxation, creep properties, mechanical properties, and secondary processing performance of cross?linked PVC were further investigated. The results indicated that the dimercapto?terephenylborate?crosslinked PVC achieved an improvement in comprehensive properties, and it could be processed secondarily under the condition of higher gel degree with 90 % of the original mechanical properties retained after processing.

Key words: poly(vinyl chloride), dimercapto?terephenylborate, reversible crosslinking, secondary processing

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