中国塑料 ›› 2011, Vol. 25 ›› Issue (01): 55-59 .DOI: 10.19491/j.issn.1001-9278.2011.01.013

• 材料与性能 • 上一篇    下一篇

m-异丙烯基-α, α-二甲基苄基异氰酸酯熔融接枝聚丙烯的研究

马丽春 孙才英 李丽萍 郭垂根   

  1. 东北林业大学理学院 东北林业大学 东北林业大学
  • 收稿日期:2010-09-14 修回日期:1900-01-01 出版日期:2011-01-26 发布日期:2011-01-26

Study on m-Isopropenyl-α, α-dimethylbenzyl Isocyanate Grafted Polypropylene

MA Lichun SUN Caiying LI Liping GUO Chuigen   

  • Received:2010-09-14 Revised:1900-01-01 Online:2011-01-26 Published:2011-01-26
  • Contact: GUO Chuigen

摘要: 在苯乙烯(St)存在下,将含不饱和键和异氰酸酯双官能团的单体m-异丙烯基-α, α-二甲基苄基-异氰酸酯(m-TMI)熔融接枝到聚丙烯(PP)上,分别采用无水滴定法、红外光谱、热重分析和差示扫描量热法对接枝产物进行测试。结果表明,m-TMI、St均与PP发生接枝反应,并且St的存在能够有效抑制PP在接枝过程中的降解,提高m-TMI与PP的接枝产物的热稳定性。在保持St用量不变的条件下,m-TMI的接枝率和接枝效率随其用量的增加先增大后减小;在保持m-TMI用量不变的条件下,m-TMI的接枝率在St与m-TMI的摩尔比为1.6时达到最大值。

关键词: m-异丙烯基-α, α-二甲基苄基异氰酸酯, 苯乙烯, 聚丙烯, 接枝

Abstract: Polypropylene (PP) was melt grafted with styrene (St) and m-isopropenyl-α, α-dimethylbenzyl isocyanate (m-TMI) which has unsaturated bonds and isocyanate group. The grafted products were characterized using non-aqueous titrations, infrared spectrum, thermogravimetry and differential scanning calorimeter. It was found that both m-TMI and St were grafted onto PP. St inhibited effectively the degradation of PP during the grafting and improved the thermal stability of grafted products. At given concentration of St, the grafting degree and grafting efficiency of m-TMI increased at first and then slightly decreased with increasing m-TMI concentration; At given concentration of m-TMI, the grafting degree of m-TMI reached a maximum at St/ m-TMI of 1.6.

Key words: m-isopropenyl-α, α-dimethylbenzyl isocyanate, styrene, polypropylene, grafting