138. Speeding of Spherulitic Growth Rate at the Late Stage of Isothermal Crystallization Due to Interfacial Diffusion for Double-Layer Semicrystalline Polymer Films
writer：Yaqiong Zhang , Feng Jiang , Wentao Wang , and Zhigang Wang *
keywords：聚乳酸，多層膜，界面擴散，球晶生長加速
source：期刊
specific source：J. Phys. Chem. B, 2014, 118 (30), pp 9112–9117
Issue time：2014年
In this study a unique phenomenon has been found for isothermal
crystallization of double-layer semicrystalline polymer films. It is
surprisingly found that there exists a speeding of poly(l-lactic acid) (PLA) spherulitic growth rate for poly(ethylene oxide)/poly(l-lactic
acid) (PEO/PLA) double-layer films at the late stage of isothermal
crystallization, which does not exist for PLA/PEO blend films and neat
PLA films. The mutual diffusion between PEO and PLA layers plays the key
factor to bring out the observed speeding of spherulitic growth rate.
This type of study provides an avenue for understanding the interplay
between polymer crystallization and interfacial diffusion in multilayer
polymer films, which is not available when employing the polymer blend
films.