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Polymers 2017, 9(11), 592; doi:10.3390/polym9110592

Enhancing Stereocomplexation Ability of Polylactide by Coalescing from Its Inclusion Complex with Urea

Department of Materials Science and Engineering, China University of Petroleum, Beijing 102249, China
Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facilities, China University of Petroleum, Beijing 102249, China
Author to whom correspondence should be addressed.
Received: 12 October 2017 / Revised: 4 November 2017 / Accepted: 9 November 2017 / Published: 9 November 2017
(This article belongs to the Special Issue Host-Guest Polymer Complexes)
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In this study, polylactide/urea complexes were successfully prepared by the electrospinning method, then the host urea component was removed to obtain a coalesced poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA) blend. The crystallization behavior of the coalesced PLLA/PDLA blend (c-PLLA/PDLA) was studied by a differential scanning calorimeter (DSC) and Fourier transform infrared (FTIR) spectroscopy. The c-PLLA/PDLA was found to show better crystallization ability than normal PLLA/PDLA blend (r-PLLA/PDLA). More interestingly, the c-PLLA/PDLA effectively and solely crystallized into stereocomplex crystals during the non-isothermal melt-crystallization process, and the reason was attributed to the equally-distributing state of PLLA and PDLA chains in the PLLA/PDLA/urea complex, which led to good interconnection between PLLA and PDLA chains when the urea frameworks were instantly removed. View Full-Text
Keywords: polylactide; urea; inclusion complex; crystallization; stereocomplex polylactide; urea; inclusion complex; crystallization; stereocomplex

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, P.; Chen, X.-T.; Ye, H.-M. Enhancing Stereocomplexation Ability of Polylactide by Coalescing from Its Inclusion Complex with Urea. Polymers 2017, 9, 592.

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