Citation: Ya-qiong Zhang, Zhi-gang Wang. INCREASED SPHERULITIC GROWTH RATES OF SEMICRYSTALLINE POLYMER DUE TO ENHANCED LIMITED LOCAL CHAIN SEGMENTAL MOBILITY AT THE INTERFACE OF DOUBLE-LAYER THIN FILMS[J]. Chinese Journal of Polymer Science, ;2013, 31(9): 1276-1283. doi: 10.1007/s10118-013-1326-4 shu

INCREASED SPHERULITIC GROWTH RATES OF SEMICRYSTALLINE POLYMER DUE TO ENHANCED LIMITED LOCAL CHAIN SEGMENTAL MOBILITY AT THE INTERFACE OF DOUBLE-LAYER THIN FILMS

Ya-qiong Zhang ,
Zhi-gang Wang ^,

Corresponding author: Zhi-gang Wang,
Received Date: 6 April 2013
Revised Date: 17 May 2013

Fund Project: This work was financially supported by the National Basic Research Program of China (No. 2012CB025901) and National Natural Science Foundation of China (No. 21174139).

In this work the nucleation and growth of spherulites for the below polylactide (PLA) layer in poly(-caprolactone)/polylactide (PCL/PLA) double-layer films during isothermal crystallization at various temperatures above the melting point of PCL have been investigated by using polarized optical microscopy (POM). It is revealed that two types of spherulitic morphologies are observed in PCL/PLA double-layer films. One is the well defined highly birefringent spherulites, and the other one is the coarse spherulites. It is interesting to find that the spherulitic growth rate of the coarse spherulites is higher than that of the well defined spherulites. It is thought that the coarse spherulites nucleate and grow with the assistance of the interfaces between the PCL and PLA layers, and the well defined highly birefringent spherulites only nucleate and grow in the PLA layer.
- Polylactide,
- Poly(-caprolactone),
- Interface,
- Crystallization,
- Spherulite
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