NDLI: Effect of Nucleation of Tricalcium Phosphate and Isothermal Annealing on the Crystallization of Poly(l-lactide-co-glycolide)

Content Provider	Springer Nature Link
Author	Zhao, Na Ma, Zhigang Li, Qing Chen, Dongliang Xiong, Chengdong
Copyright Year	2012
Abstract	We investigated the effect of nucleation and isothermal annealing on the crystallization behavior of a random copolymer, poly(l-lactide-co-glycolide) (PLLGA), with monomer molar ratios of 85/15 (PLLGA85/15) by scanning electron microscopy, polarizing optical microscopy, differential scanning calorimetry, and X-ray diffraction, and examination of the tensile properties of the resultant product. The effect of heterogeneous nucleation was assessed by the addition of tricalcium phosphate (TCP) as a nucleating agent. Nucleation and isothermal annealing of PLLGA at 130 °C were conducted to improve the degree of crystallinity of the copolymer. The fracture surfaces of the TCP/PLLGA85/15 composite bar showed a considerable number of spherulites with TCP as their nucleus. Addition of TCP and subsequent annealing improved the degree of crystallinity. After annealing, the TCP/PLLGA85/15 composite samples gained nearly the same strength that the pure PLLGA85/15 samples possessed. It is believed that this method will enhance the practical application of this nucleating agent in the processing of polymers.
Starting Page	259
Ending Page	265
Page Count	7
File Format	PDF
ISSN	15662543
Journal	Journal of Polymers and the Environment
Volume Number	21
Issue Number	1
e-ISSN	15728900
Language	English
Publisher	Springer US
Publisher Date	2012-08-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nucleation Isothermal annealing Poly(l-lactide-co-glycolide) Crystallization Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Environmental Engineering Polymers and Plastics

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