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- W2360228015 abstract "The polyurethane with hydrophilic group in the chain was synthesized from polyesterglycol,diphenylmethane diisocyanate(MDI),isophorne diisocyanate(IPDI),dimethylol propionic acid(DMPA),ethylenediamine(EDA)and trimethylolpropane(TMP)and other monomers by self-emulsified method.The structure of polyurethane was characterized by Fourier transform infrared spectrometer(FTIR).The mechanical properties and the shape memory properties were measured.The effects of the structure,the content of hard segment,the recovery temperature and the draw-recovery times on shape recovery ratio of polyurethane were discussed.The results showed that:the aromatic ring and chemical cross-linked structure were introduced into the polyurethane chain;the mechanical property and the shape memory property of the polyurethane were improved.The shape recovery ratio of the polyurethane was the highest,when the hard segment content reached its optimum value.The different hard segments which could reach the maximum shape recovery ratio had different critical hard segment content.The more stable the hard segment structure was,the less the hard segment content in the shape memory polyurethane became.Several times of draw-recovery could enhance the shape memory effect." @default.
- W2360228015 created "2016-06-24" @default.
- W2360228015 creator A5038916957 @default.
- W2360228015 date "2009-01-01" @default.
- W2360228015 modified "2023-09-23" @default.
- W2360228015 title "Effect of Hard Segment Structure on Polyurethane Shape Memory Effect with Hydrophilic Group in the Chain" @default.
- W2360228015 hasPublicationYear "2009" @default.
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