高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (4): 739.

• 研究论文 • 上一篇    下一篇

马来酸酐接枝氢化苯乙烯-丁二烯嵌段共聚物增韧聚苯醚体系的韧性、亚微相态和流变性能

汪晓东, 张强, 金日光   

  1. 北京化工大学, 材料科学与工程学院, 北京 100029
  • 收稿日期:2000-11-14 出版日期:2002-04-24 发布日期:2002-04-24
  • 通讯作者: 汪晓东(1967年出生),男,博士,副教授,从事电子材料及聚合物共混改性的研究.E-mail:wangxd@buct.edu.cn E-mail:wangxd@buct.edu.cn
  • 基金资助:

    国家"八六三"高新技术计划项目(批准号:715－007－0060)资助.

Toughness, Morphology and Rheology of Toughening System ofPoly(phenylene oxide) with Maleated HydrogenatedStyrene-butadiene Block Elastomer

WANG Xiao-Dong, ZHANG Qiang, JIN Ri-Guang   

  1. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2000-11-14 Online:2002-04-24 Published:2002-04-24

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被引次数

11

摘要： 考察了氢化苯乙烯-丁二烯嵌段共聚弹性体(SEBS)及其马来酸酐接枝共聚物(SEBS-g-MA)增韧聚苯醚(PPO)体系。DSC谱图显示,PPO与SEBS的共混物仅有一个Tg,两者完全相容;PPO与SEBS-g-MA的共混物存在两个Tg,只能达到部分相容。力学性能研究表明,在PPO/SEBS体系中,基体中分散相SEBS的相界面模糊,无法引发基体银纹和剪切屈服,增韧PPO的效果有限;而部分相容的PPO/SEBS-g-MA共混物显示了增韧剂良好的相界面引发基体银纹和剪切屈服的作用,其缺口冲击强度在SEBS-g-MA质量分数为20%时达到1260J/m的超韧性。亚微相态显示,SEBS在PPO中呈现条形分散相的"海岛"结构;而SEBS-g-MA在基体中呈现网络结构。流变性能研究显示,PPO/SEBS共混物的表观粘度均高于PPO,并随SEBS的含量增加而变大;而PPO/SEBS-g-MA则完全相反。

关键词: 聚苯醚, 马来酸酐接枝SEBS, 增韧, 相容性, 亚微相态

Abstract: The toughening system of poly(phenylene oxide) (PPO) blends with hydrogenated styrene-bu-tadiene block elastomer(SEBS) and a version grafted with maleic anhydride(SEBS-g-MA) was investigat-ed.Dfferential scanning calorimeter thermograms demonstrated that PPO was miscible with SEBS, whichshowed a unique Tg, but PPO was partially compatible with SEBS-g-MA because there were two of Tg.Toughness research revealed that PPO/SEBS blends achieved litter higher notched Ized impact strengththan pure PPO.However, SEBS-g-MAcould toughen PPO effectively and the blends reached supertoughness with a notched Izod impact strength of 1260J/m at the SEBS-g-MA content of 20%.Trans-mission electron microscopy showed a typical "sea-island" structure in PPOdomain.However, SEBS-g-MA demonstrated a network structure in PPOmatrix.Toughness improvement for PPOblends withSEBS-g-MAwas contributed to stress releasing in micro-cavity.The rheological properties study revealedthat the apparent viscosity of PPO/SEBS blends was improved with the increasing of SEBScontent, butopposite for PPO/SEBS-g-MA blends.

Key words: Poly(phenylene oxide), SEBS-g-MA, Toughening, Miscibility, Submicro-phase

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