Citation: Fei-fei Xue, Xue-si Chen, Li-jia An, Sergio S. Funari, Shi-chun Jiang. CONFINED LAMELLA FORMATION IN CRYSTALLINE-CRYSTALLINE POLY(ETHYLENE OXIDE)-b-POLY(-CAPROLACTONE) DIBLOCK COPOLYMERS[J]. Chinese Journal of Polymer Science, ;2013, 31(9): 1260-1270. doi: 10.1007/s10118-013-1325-5 shu

CONFINED LAMELLA FORMATION IN CRYSTALLINE-CRYSTALLINE POLY(ETHYLENE OXIDE)-b-POLY(-CAPROLACTONE) DIBLOCK COPOLYMERS

Corresponding author: Shi-chun Jiang,
Received Date: 25 March 2013
Revised Date: 1 June 2013

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 20974077, 51173130). Synchrotron experiments at Beam line A2 were supported by HASYLAB project (I-20110306, II20090111).

The real time and in situ investigation of the crystallization process and structure transitions of asymmetric crystalline-crystalline diblock copolymers from the melt was performed with synchrotron simultaneous SAXS/WAXS. The asymmetric poly(ethylene oxide)-b-poly(-caprolactone) diblock copolymers were chosen for the present study. It was shown that the short blocks crystallized later than the long blocks and final lamellar structure was formed in all of the asymmetric diblock copolymers. The final lamellar structure was confirmed by AFM observation. The SAXS data were analyzed with different methods for the early stage of the crystallization. The Guinier plots indicated that there were no isolated domains formed before the formation of lamellae in the asymmetric diblock copolymers during the crystallization process. Debye-Bueche plots implied the formation of correlated domains during crystallization.
- PEO-b-PCL diblock copolymers,
- Synchrotron simultaneous SAXS/WAXS,
- Polymer crystallization,
- Confined lamella formation
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