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Crystals 2017, 7(2), 56; doi:10.3390/cryst7020056

Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present

1
Department of Chemical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701-01, Taiwan
2
National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu 30076, Taiwan
*
Author to whom correspondence should be addressed.
Received: 29 November 2016 / Accepted: 12 February 2017 / Published: 15 February 2017
(This article belongs to the Special Issue Crystal Morphology and Assembly in Spherulites)
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Abstract

Poly(trimethylene terephthalate) (PTT) with its unique spherulitic morphologies, highly birefringent features, and crystal stability serves as a good candidate to study polymer crystallization and assembly. This review compiles the main findings on crystallization in PTT, including birefringence and morphology, thermal behavior, as well as the interior structure of PTT banded spherulites, in order to elucidate the origin and formation mechanism of banded spherulites. Interior observation through the inner anatomy of crystal assembly in banded spherulites hidden under the top surface is necessary to provide a complete picture for the unsettled arguments about formation mechanism. Careful attention should be taken when selecting the etching agent for exposing the lamellar structure of polymer spherulite, otherwise, misinterpretation could result View Full-Text
Keywords: polymer crystallization; lamellar assembly; spherulites; poly(trimethylene terephthalate); birefringence polymer crystallization; lamellar assembly; spherulites; poly(trimethylene terephthalate); birefringence
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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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Lugito, G.; Woo, E.M.; Chuang, W.-T. Interior Lamellar Assembly and Optical Birefringence in Poly(trimethylene terephthalate) Spherulites: Mechanisms from Past to Present. Crystals 2017, 7, 56.

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