高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (7): 1244.

• 研究论文 • 上一篇    下一篇

PP-g-(GMA-co-St)对PA6/PC共混物的反应增容作用

李志君, 郭宝华, 胡平, 谢续明   

  1. 清华大学化工系, 高分子研究所, 材料科学与工程研究院教育部先进材料重点实验室, 北京 100084
  • 收稿日期:2000-07-12 出版日期:2001-07-24 发布日期:2001-07-24
  • 通讯作者: 谢续明(1962年出生),男,博士,教授,主要从事高分子物理化学和聚合物新型材料研究.
  • 基金资助:

    华南理工大学聚合物成型装备国家工程研究中心科学与技术基金(批准号:99-001)

Reactive Compatibilization of Nylon6/Polycarbonate Blends by Addition of PP-g-(GMA-co-St)

LI Zhi-Jun, GUO Bao-Hua, HU Ping, XIE Xu-Ming   

  1. Departmentof Chemical Engineering, Institute of Polymer Scienceand Engineering, Educational Ministry Laboratory of Advanced Materials, Materials Research Center, Tsinghua University, Beijing 100084, China
  • Received:2000-07-12 Online:2001-07-24 Published:2001-07-24

PDF (PC)

被引次数

53

摘要： 用红外、扫描电镜、熔体流动速率和力学性能等测试方法,研究了甲基丙烯酸缩水甘油酯(GMA)和苯乙烯(St)多单体熔融接枝聚丙烯[PP-g-(GMA-co-St)]对PA6/PC共混物的反应增容作用.研究结果表明,在熔融共混过程中,PP-g-(GMA-co-St)中的环氧基与PA6的端氨基及PC的端羟基原位生成的接枝共聚物有效地降低了共混物相间的界面张力,明显提高了共混物相界面的粘着力.少量的PP-g-(GMA-co-St)就能使PA6和PC的相容性得到显著改善.当PP-g-(GMA-co-St)的质量分数为10%时,共混物分散相的相区尺寸细化到0.2μm,其力学性能也有较大提高.PA6/PC/PP-g-(GMA-co-St)共混物的力学性能均衡,达到了弹性体增韧体系难以达到的效果.即使PP-g-(GMA-co-St)组分含量为20%时,共混物仍能保持较好的力学性能,特别是在共混物的韧性得以提高的同时,其强度和伸长率也提高.

关键词: 尼龙6, 聚碳酸酯, 聚丙烯, 多单体, 反应增容

Abstract: The glycidyl methacrylate(GMA) and styrene(St) multi monomers melt grafted PP, PP-g-(GMA-co-St), was used as a reactive compatibilizer of PA6/PCblends in this study. The effect of the addition of PP-g-(GMA-co-St) on compatibility of the blends was investigated. It was found that the addition of PP-g-(GMA-co-St) greatly reduced the MFRvalues of the PA6/PC, implying enhanced compatibility between PA6 and PCin the presence of the PP-g-(GMA-co-St). The phase morphologies of the blends with increasing content of PP-g-(GMA-co-St) were observed by SEM. The particle size of PCdecreased with increasing content of PP-g-(GMA-co-St) in the blend. Much finer dispersion of discrete polycarbonate phase with average domain size 0.2 μm was reached when the content of the PP-g-(GMA-co-St) was 10%(PA6/PC, mass ratio 72/28). This should be due to the formation of the PA6 PP PCcopolymer by chemical reactions between GMAin PP-g-(GMA-co-St) and the terminal amino or carboxylic groups of PA6 and between GMAin PP-g-(GMA-co-St) and terminal -OHgroup of PCduring the melt extrusion process. The formation of PA6 PP PCcopolymer is also characterized by FTIR. The mechanical properties of the PA6/PCblends, particularly the Izod impactstrength and elongation at break were markedly improved by addition of a small amount of PP-g-(GMA-co-St). Itshould be noted that tensile strength of the PA6/PC/PP-g-(GMA-co-St) was also kept with increasing PP-g-(GMA-co-St) content. The PA6/PCblends with balanced mechanical properties can be obtained by addition of PP-g-(GMA-co-St).

Key words: Polyamide6, Polycarbonate, Polypropylene, Multi monomer, Reaction compatibilization

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