I.r. spectroscopy, d.s.c., WAXD and optical microscopy were employed to investigate the differences between hydrogen bonding and crystallization behaviour depending on hard segment concentration in polyether- and polyester-based polyurethaneureas (PUUs). It has been found that the hard segment crystallization behaviour of polyether-based PUU is higher than polyester-based PUU for the same hard segment content. Hydrogen bonding in polyether-based PUU is formed mainly between hard segments, which promotes crystallization of hard segments. Hydrogen bonding in polyester-based PUU is formed mainly between soft and hard segments, which hinders the crystallization of hard segments.
Посилання на статтю:
Hydrogen bonding and crystallization behaviour of segmented polyurethaneurea" effects of hard segment concentration / Xiu Yuying, Zhang Zhiping, Wang Dening and Ying Shengkang // Polymer. – 1992. – Vol 33. – P. 1335-1338.