文章摘要
异氰脲酸酯改性聚氯乙烯泡沫的制备与耐热性能
Preparation and Heat Resistance of Polyvinyl Chloride Foams Modified with Isocyanurate
  
DOI:10.16865/j.cnki.1000-7555.2018.08.022
中文关键词: 聚氯乙烯泡沫  异氰脲酸酯  硬脂酸钾  玻璃化转变温度
英文关键词: polyvinyl chloride foam  isocyanurate  potassium stearate  glass transition temperature
基金项目:国家高技术研究发展计划(2015AA033901);国家自然科学基金资助项目(51233005);吉林省重大科技专项(20140203023GX)
作者单位
翟建峰1,2, 薛 俭1,3, 姜治伟1, 唐 涛1, 王 军2, 王 治4 1. 中国科学院长春应用化学研究所 高分子物理与化学国家重点实验室吉林 长春 1300222. 哈尔滨工程大学 材料科学与化学工程学院黑龙江 哈尔滨 150001 3.长春工业大学 化学工程学院吉林 长春 1300124. 河南省科学院 质量检验与分析测试研究中心河南 郑州 450002 
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中文摘要:
      以甲苯二异氰酸酯(TDI)为原料,硬脂酸钾为三聚催化剂,采用本体聚合法合成了三聚甲苯二异氰酸酯(tTDI),然后将不同tTDI含量的TDI溶液作为交联剂制备交联聚氯乙烯泡沫材料。通过红外光谱、核磁碳谱分析研究了泡沫制备过程中化学结构的变化以及最终的交联网络。结果表明,在最终泡沫的交联网络中实现了异氰脲酸酯结构的定量引入。动态力学热分析对泡沫玻璃化温度的研究表明,苯酐的体系中三聚体含量在10%左右出现拐点;有苯酐改性的体系中,泡沫的玻璃化转变温度随着三聚体含量的增加,呈线性升高趋势。
英文摘要:
      The crosslinked polyvinyl chloride (PVC) foams with quantitative isocyanurate from the toluene diisocyanate trimer (tTDI) synthesized by bulk polymerization of toluene diisocyanate (TDI) in presence of potassium stearate were prepared. The chemical structures in the different process section and the final cross-linking network of the foams were characterized by FT-IR and NMR. When the fresh tTDI was used immediately, the additional tTDI created from mixing to prefoam process wasn’t detected, despite self-polymerizing in the mixture of TDI and tTDI. It is proved that the quantitative isocyanurate structure is combined in the final crosslinking network of PVC foams. The glass transition temperature(Tg) of foams was defined by DMA. It is shown that an inflection point at about 10% appears in the tTDI content vs. Tg curve of the foams in absence of phthalic anhydride, and the Tg of foams compounded with phthalic anhydride rises linearly with the increase of trimer content.
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