Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (8): 1176.

• Articles • Previous Articles     Next Articles

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

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

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