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

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

1
Department of Materials Science and Engineering, China University of Petroleum, Beijing 102249, China
2
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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Abstract

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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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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