Waterborne polyurethane(WPU) was prepared using 4,4′-methylenebis(cyclohexyl isocyanate)(HMDI) as the isocyanate component,polytetramethylene ether glycol(PTMEG) as the polyol component,and 1,4-butanediol(BDO) as the chain extender.The influences of hard segment content on carbonyl hydrogen bonding degree,modulus and water absorption performance were studied by FT-IR analysis,mechanical properties test and water resistance test.The results showed that as the hard segment content increased,the carbonyl hydrogen bonding degree,modulus and tensile strength of WPU increased,and the elongation at break and water absorption decreased.When the hard segment content was 27.5%,WPU had a low modulus and suitable strength and water resistance.
Liu Kai, Yao Ming, Xie Guitang, Zhang Jun, Jiang Yu, Jiang Zhiguo
. Influence of hard segment content on property of HMDI waterborne polyurethane[J]. New Chemical Materials, 2021
, 49(8)
: 165
-168
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.08.034
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