The nucleation effect and thermal behavior of Poly(L-lactic acid) in the presence of a Bisamides compound. | [Journal of Chemical Society of Pakistan • 2014]

Author(s):

1. Yan-Hua Cai: Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing, University of Arts and Sciences, Yongchuan, Chongqing, P.R. China;School of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, P.R. China

2. Yin-Qing Fan: Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing, University of Arts and Sciences, Yongchuan, Chongqing, P.R. China

3. Yong-You Tian: School of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, P.R. China

Abstract:

The nucleation effect and thermal behavior of bisamides compound(N, N`-Bis(benzoyl) tridecanedioic acid dihydrazide (NA)) as organic nucleating agent for poly(L-lactic acid) (PLLA) was evaluated by differential scanning calorimetry (DSC), polarized optical microscopy (POM) and wide angle X-ray diffraction (WAXD). Compared to neat PLLA, NA could increase the overall crystallization rate of PLLA. Upon the addition of 0. 8% NA, the crystallization peak temperature from 96. 28 ? to 113. 58 ?, and the crystallization enthalpy increased from 1. 379 J·g-1 to 30. 51 J·g-1. POM showed that the spherulite number of PLLA increased and the spherulite size significantly reduced in the presence of NA. The results of melting behavior at different conditions showed that the melting behavior of PLLA/NA samples was affected significantly by crystallization time, crystllization temperature and cooling rate. And there existed double-melting peaks resulting from melting-recrystallization at low crystallization temperature.

Page(s): 371-376

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 36, Issue: 3, Year: 2014

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