Revisiting the crystallization of poly(2‐alkyl‐2‐oxazoline)s
作者： A. Levent Demirel , Pınar Tatar Güner , Bart Verbraeken , Helmut Schlaad , Ulrich S. Schubert
DOI: 10.1002/POLB.23967
关键词: Materials science 、 Side chain 、 Alkyl 、 Polymerization 、 Copolymer 、 Polymer chemistry 、 Crystallization 、 Glass transition 、 Crystallization of polymers 、 Polymer
摘要: Poly(2-alkyl-2-oxazoline)s (PAOx) exhibit different crystallization behavior depending on the length of alkyl side chain. PAOx having methyl, ethyl, or propyl chains do not show any bulk crystallization. Crystallization in heating cycle, that is, cold crystallization, is observed for with butyl and pentyl chains. For longer occurs cooling cycle. The attributed to polymer chain mobility line glass transition temperature (Tg) dependency length. decrease decreasing hinders relaxation backbone thermodynamic equilibrium crystalline structure. Double melting PButOx PiPropOx which explained by melt-recrystallization mechanism. Isothermal experiments between 60 90 °C 150 can crystallize when enough time given. Tg corresponding increase at T > increasing be an distance backbones thus average strength amide dipole interactions. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Phys. 2016, 54, 721–729
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