| 硼酸锌对PVC力学及阻燃性能的影响 |
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| 引用本文： | 郭少云,王泽琼.硼酸锌对PVC力学及阻燃性能的影响[J].高分子材料科学与工程,1997,13(3):100-105. |
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| 作者姓名： | 郭少云 王泽琼 |
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| 作者单位： | 高分子材料工程国家重点实验室成都科技大学高分子研究所 |
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| 基金项目： | 国家自然科学基金,国家教委优秀年轻教师基金,四川省青年科技基金 |
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| 摘 要： | 通过ＴＧＡ、极限氧指数测定、ＳＥＭ和力学性能测定研究了ＰＶＣ／硼酸锌体系的热降解行为、阻燃性能和力学性能。研究结果表明，在ＰＶＣ中加入５％经偶联剂和振磨处理的硼酸锌，ＰＶＣ的冲击强度、拉伸强度和极限氧指数均得到了明显提高。ＰＶＣ中加入硼酸锌后，在ＰＶＣ热降解过程中、硼酸锌释放出的结合水能吸收ＰＶＣ放出的氯化氢，生成的氯化锌使ＰＶＣ脱氯化氢的反应活化能降低，反应速度加快，但使ＰＶＣ脱氯化氢后分子链倾向于形成反式多烯链结构，有利交联和炭化反应，使ＰＶＣ热失重明显减少，成炭量增加。硼酸锌可以用作ＰＶＣ的阻燃和抑烟剂。
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| 关 键 词： | 聚氯乙烯 阻燃 硼酸锌 阻燃剂 |
EFFECT OF ZINC BORATE ON MECHANICAL PROPERTIES AND FLAME RETARDANCY OF PVC |
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| Guo Shaoyun,Wang Zeqiong,Li Sunzhao,Xu Xi.EFFECT OF ZINC BORATE ON MECHANICAL PROPERTIES AND FLAME RETARDANCY OF PVC[J].Polymer Materials Science & Engineering,1997,13(3):100-105. |
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| Authors: | Guo Shaoyun Wang Zeqiong Li Sunzhao Xu Xi |
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| Abstract: | The thermal degradation, flame retardancy and mechanical properties of Zinc borate(ZB) filled PVC were studied through TGA, limited oxygen index(LOI) test, SEM and mechanical property test. The impact strength, strength at break and limited oxygen index of PVC will be improved quite a lot after blending it with 5% of ZB pretreated by coupling agent. In presence of ZB, during thermal degradation of PVC, ZB releases its hydrated water and reacts with hydrogen chloride liberated by PVC. Zinc chloride formed accelerates dehydrochlorination as well as crosslinking and charring reactions of PVC due to the formation of trans polyene structure after dehydrochlorination, makes the mass loss of PVC go down. ZB is a pretty good flame retardant and smoke suppressant for PVC. |
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| Keywords: | poly(vinyl chloride) flame retardancy zinc borate |
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