Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)

© 2017 Trans Tech Publications, Switzerland. The influence of molecular weight of poly(D-lactide) (PDL) on the melt crystallization was successfully investigated by non-isothermal differential scanning calorimetry (DSC) technique. The synthesized PDLs with three different number average molecular we...

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Main Authors: Limwanich W., Phetsuk S., Meepowpan P., Kungwan N., Punyodom W.
Format: Book Series
Published: 2017
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028715500&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/41009
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-410092017-09-28T04:15:03Z Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide) Limwanich W. Phetsuk S. Meepowpan P. Kungwan N. Punyodom W. © 2017 Trans Tech Publications, Switzerland. The influence of molecular weight of poly(D-lactide) (PDL) on the melt crystallization was successfully investigated by non-isothermal differential scanning calorimetry (DSC) technique. The synthesized PDLs with three different number average molecular weights ( n M ) of 2.39×105 (PDL1), 1.09×105 (PDL2) and 0.61×105 (PDL3) were utilized in this study. From DSC kinetics analysis, it was found that the rate of PDLs crystallization increased with increasing cooling rate. Furthermore, the crystallization rate of PDLs was dependent on molecular weight and determined to be in the following order: PDL3 > PDL2 > PDL1. The crystallization mechanism was analyzed by the Avrami, Ozawa and Liu models. The mechanism of all PDLs crystallization was nucleation with three dimensional growths. Furthermore, the molecular weight of PDLs affected not only the crystallization rate but also the thermal property. As the molecular weight of PDLs increased, the melting temperature (Tm) increased but the heat of melting (ΔHm) decreased. 2017-09-28T04:15:03Z 2017-09-28T04:15:03Z 2017-01-01 Book Series 10139826 2-s2.0-85028715500 10.4028/www.scientific.net/KEM.751.221 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028715500&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/41009
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description © 2017 Trans Tech Publications, Switzerland. The influence of molecular weight of poly(D-lactide) (PDL) on the melt crystallization was successfully investigated by non-isothermal differential scanning calorimetry (DSC) technique. The synthesized PDLs with three different number average molecular weights ( n M ) of 2.39×105 (PDL1), 1.09×105 (PDL2) and 0.61×105 (PDL3) were utilized in this study. From DSC kinetics analysis, it was found that the rate of PDLs crystallization increased with increasing cooling rate. Furthermore, the crystallization rate of PDLs was dependent on molecular weight and determined to be in the following order: PDL3 > PDL2 > PDL1. The crystallization mechanism was analyzed by the Avrami, Ozawa and Liu models. The mechanism of all PDLs crystallization was nucleation with three dimensional growths. Furthermore, the molecular weight of PDLs affected not only the crystallization rate but also the thermal property. As the molecular weight of PDLs increased, the melting temperature (Tm) increased but the heat of melting (ΔHm) decreased.
format Book Series
author Limwanich W.
Phetsuk S.
Meepowpan P.
Kungwan N.
Punyodom W.
spellingShingle Limwanich W.
Phetsuk S.
Meepowpan P.
Kungwan N.
Punyodom W.
Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
author_facet Limwanich W.
Phetsuk S.
Meepowpan P.
Kungwan N.
Punyodom W.
author_sort Limwanich W.
title Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
title_short Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
title_full Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
title_fullStr Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
title_full_unstemmed Influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(D-Lactide)
title_sort influence of molecular weight on the non-isothermal melt crystallization of biodegradable poly(d-lactide)
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028715500&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/41009
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