高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (8): 1176.

• 研究论文 • 上一篇    下一篇

CAMDA扩链聚氨酯脲的硬段对形态与性能的影响

杲云, 李迈进, 王得宁, 胡春圃, 应圣康   

  1. 华东化工学院材料科学研究所, 上海 200237
  • 收稿日期:1992-12-01 修回日期:1993-04-22 出版日期:1993-08-24 发布日期:1993-08-24
  • 通讯作者: 应圣康.
  • 作者简介:第一作者:男, 29岁, 硕士, 讲师.
  • 基金资助:

    国家自然科学基金会重点基金

The Effect of Hard Segment Content of CAMDA-Extended Polyurethane-Urea on Morphology and Properties

GAO Yun, LI Mai-Jin, WANG De-Ning, HU Chun-Pu, YING Sheng-Kang   

  1. Institute of Material Science and Engineering, East China Univ.of Chem.Technology, Shanghai, 200237
  • Received:1992-12-01 Revised:1993-04-22 Online:1993-08-24 Published:1993-08-24

PDF (PC)

被引次数

2

摘要： 由红外光谱、核磁共振及质谱分析证实了所合成的3-氯-3'-甲氧基-4,4'-二氨基二苯基甲烷(CAMDA)具有预期的化学结构.用RIM方法制成的CAMDA基聚氨酯脲(PUU)性能接近于DETDA扩链的PUU.用快速手工浇注法制备了一系列由CAMDA扩链的不同硬段含量的PUU样品.采用DSC、SEM观察了硬段含量由10％增加到45％PUU形态的变化,并测量了力学性能.实验结果表明:随着硬段含量增加,PUU的形态由平行间隔的软、硬链段富集区经相互穿叉的软、硬段富集区,进一步聚集成硬链段富集球状超级结构,强度亦相应提高.

关键词: 反应注射成型, 聚氨酯脲, 扩链剂, 结构与性能

Abstract: Anew aromatic diamine (CAMDA) as chain extender for RIMpolyurethane-urea (PUU) was synthesized.Structure of CAMDAwas confirmed by IR, 1HNMRspectra and MSanalysis.CAMDAis a viscous liquid chain extender with proper reactivity which can not only be used for RIMoperation but also for casting elastomer.The ultimate physical properties of CAM-DA-extended RIMPUUis close to that of DETDAextended one.Aseries of CAMDA-extended PUUsamples with hard segment content of 10%-45% were prepared for studying morphology by DSC, SEM, the corresponding mechanical properties were measured.The results showed that the hard segment rich domain changed from loosen parallel streaks, interlacing streaks to spherulitic superstructures with increasing the hard segment content, the strength of PUUincreased with this trend of morphology change.

Key words: RIM, Polyureathane-urea, Chain extender, Structure and property

TrendMD: