文章摘要
二氧化碳诱导热塑性聚氨酯结晶增强其拉伸性能
Thermoplastic Polyurethane Crystallization Induced by Carbon Dioxide and Enhancement of Tensile Strength
  
DOI:10.16865/j.cnki.1000-7555.2018.03.009
中文关键词: 热塑性聚氨酯  氢键化程度  结晶性  拉伸强度
英文关键词: thermoplastic polyurethane  hydrogen bond degree  crystallization  tensile strength
基金项目:国家重点研发计划(2016YFB0302204)
作者单位
李德鹏1,姜修磊2,刘 涛1,赵 玲1 1. 华东理工大学 上海市多相结构材料化学工程重点实验室,上海 200237
2. 浙江新恒泰新材料有限公司,浙江 嘉兴 314000 
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中文摘要:
      通过高压傅里叶变换红外光谱方法研究了CO2 对热塑性聚氨酯(TPU)氢键结构的作用,结合广角X射线衍射和扫描电镜的方法,研究了CO2 低温退火对TPU 结晶性能及拉伸强度的影响。结果表明,CO2 可以与TPU 产生Lewis酸碱作用,并且能降低TPU 的氢键化程度;CO2 可以诱导TPU 的结晶,使其结晶度增大,从而增强其拉伸强度;CO2 退火后出现微发泡,比未发泡的TPU 样品拉伸强度更高。
英文摘要:
      The effect of CO2 on thermoplastic polyurethane (TPU) hydrogen bond structure was studied by FT-IR at high pressure. The effect of CO2 annealing at low temperature on the TPU crystallization and tensile strength was studied by XRD and SEM. The results show that a Lewis acid-base interaction occurs between CO2 and polar groups of TPU, and the hydrogen bond degree of TPU is decreased by this interaction. The crystallization degree of TPU is increased due to CO2 induced crystallization. The tensile strength of TPU is enhanced with increasing crystallization. The tensile strength of TPU with slight foaming after CO2 annealing is higher than that without foaming.
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