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Effect of diisocyanate on pyridine containing shape memory polyurethanes based on N , N ‐bis(2‐hydroxylethyl)isonicotinamide
Author(s) -
Yuan Hongming,
Ge Zaochuan,
Chen Shaojun,
Chen Shiguo,
Yang Haipeng,
Zhuo Haitao
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40721
Subject(s) - isophorone diisocyanate , polyurethane , isonicotinamide , thermal stability , materials science , polymer chemistry , chemical engineering , chemistry , composite material , molecule , organic chemistry , hydrogen bond , engineering
This article demonstrates a comparative investigation about the effect of diisocyanate on pyridine containing shape memory polyurethanes (Py‐SMPUs), which are synthesized with N , N ‐bis(2‐hydroxylethyl)isonicotinamide (BINA) and four different diisocyanates: 1,6‐hexanediisocyante (HDI), isophorone diisocyanate (IPDI), methylene diphenyl diisocyanate (MDI), and tolylene diisocyanate (TDI). Results show that all BINA–SMPU systems have amorphous reversible phase. Comparatively, the MDI–BINA and TDI–BINA systems show higher T g ; and the HDI–BINA and IPDI–BINA systems show better thermal stability. In addition, the HDI–BINA and the IPDI–BINA systems exhibit good thermal‐induced shape memory effect and good moisture‐sensitive shape memory effect due to their better moisture absorption properties. Particularly, the HDI–BINA system has better response speed and better shape recovery. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40721.