文章摘要
MC尼龙链增长与聚集态形成过程相互作用对其性能的影响
Effects of the Interaction Between the Chain Propagation and the Aggregation Structure Formation on the Performance of MC Nylon
  
DOI:10.16865/j.cnki.1000-7555.2018.06.012
中文关键词: 浇铸尼龙  链增长  聚集态  相互作用  相界面  高性能化
英文关键词: monomer casting nylon  chain propagation  aggregation  interaction  phase interface  high performance
基金项目:国家自然科学基金项目(51373045)
作者单位
周意杨1, 王 平1, 刘 超1, 黄昊鹏1, 方华高1,2, 许全起, 范 浩3, 陈大为1, 丁运生1,2 1. 合肥工业大学 化学与化工学院安徽 合肥 230009
2. 先进功能材料与器件安徽省重点实验室安徽 合肥 230009
3. 河北辛集腾跃实业有限公司河北 辛集 523600 
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中文摘要:
      通过采用双官能团助催化剂、三官能团助催化剂及延长三官能团体系保压时间3种工艺,制备了浇铸尼龙(MC尼龙)样品2-FC-MC、3-FC-MC和3-FC-T-MC尼龙。利用差示扫描量热分析和偏光显微镜对样品聚集态结构进行了表征,并对其力学性能、耐热性能和吸水性能进行了测试,研究了MC尼龙链增长与其聚集态形成过程中相互作用对其性能的影响。结果表明,2-FC工艺制备的MC尼龙晶体结构完整且致密,同时存在α晶和γ晶,但相分离明显,材料呈脆性;3-FC工艺聚合过程中MC尼龙链增长速率较快,但链段有效堆叠效率较低,样品的晶体结构不完整,相分离程度较低,冲击性能较好,但热稳定性较差,且易吸水;3-FC-T-MC尼龙的链段有效堆叠程度明显提高,存在结构较完善的晶体,且相界面不明显,综合性能较高。
英文摘要:
      In this study, 2-FC-MC nylon, 3-FC-MC nylon and 3-FC-T-MC nylon were obtained by three kinds of processes, such as by using bifunctional co-catalyst (2-FC), three functional co-catalyst (3-FC), and prolonging the holding time based on 3-FC technology (3-FC-T-MC). The aggregation structure of all samples was investigated by DSC and POM. Meanwhile, the mechanical properties, thermal stability and water absorption of samples were also investigated to reveal the effects of the interaction between the chain propagation and the aggregation structure formation on the performance of MC nylon. The results show that 2-FC-MC nylon crystal structure is complete and compact, the α-form crystal and γ-form crystal are simultaneously formed in 2-FC-MC nylon, but the phase separation in 2-FC-MC nylon is obvious, which induce the 2-FC-MC nylon more brittle; the polymerization rate of 3-FC-MC nylon is fast, but the chain cannot effectively stack and induce an imperfect crystal structure, and the phase separation in 3-FC-MC nylon is not obvious, which endow the 3-FC-MC nylon with a high impact strength, but the thermal stability and water resistance are poor; in the process of 3-FC-T-MC, the effective degree of chain stacking is improved obviously, and the crystal with better structure is formed, the phase interface is not obvious and the comprehensive performance is higher.
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