Chem. J. Chinese Universities ›› 1989, Vol. 10 ›› Issue (12): 1242.

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A Study on Synthesis and Properties of Block Polyurea with Different Hard Segment Content

Chen Zhusheng   

  1. Department of Chemistry and Biology, Yantai Univerity, Beijing
  • Received:1988-04-26 Online:1989-12-24 Published:1989-12-24

Abstract: High molecular weight linear polyureas with different hard-segment contents were obtained by using a two-step solution polymerization.Elimination of water, careful choice of solvent, reactant concentration, and good control of reaction temperature are essential to obtain satisfactory results.DMSand DSCwere used to elucidate properties of these polyureas.The polyureas were transformed from a soft elastomer to a high modulus plastic with the increase of segment content.

Key words: Polyurea, Polyurethane, Block copolymer

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