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author:

Fan, Guo-Dong (Fan, Guo-Dong.) [1] | Zhang, Chun-Mei (Zhang, Chun-Mei.) [2] | Lin, Zhen-Yu (Lin, Zhen-Yu.) [3] (Scholars:林振宇) | Chen, Chun-Lan (Chen, Chun-Lan.) [4] | Yang, Rui (Yang, Rui.) [5] | Li, Tian-Tian (Li, Tian-Tian.) [6]

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Abstract:

The carboxyl-terminated modified polylactic acid copolymers of P(LA/SA), P(LA/CA) and P(LA/AC) were synthesized via directly melt polycondensation with D, L-racemic lactic acid (D, L-LA) as raw material and stannous octoate as catalyst. The copolymerization reaction was performed at the temperature of 168°C and the pressure of 0.098 MPa using linear heating method. The copolymers were characterized by viscosity-average molecular weight, FT-IR, 1H-NMR, DSC, TGA and XRD. The results demonstrate that Tg of the carboxyl-terminated copolymers is lower than PLA, reducing the rigidity of PLA; the copolymers have good thermal stability for one-step thermal decomposition; compared with PLA, the crystallinity of P(LA/SA) and P(LA/AC) decreased, while the P(LA/CA) slightly decreased, so that, by adjusting the ratio of lactic acid and modifier to adjust the mechanical properties.

Keyword:

Body fluids Copolymerization Copolymers Lactic acid Mechanical properties Polycondensation Pyrolysis Synthesis (chemical)

Community:

  • [ 1 ] [Fan, Guo-Dong]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • [ 2 ] [Fan, Guo-Dong]Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou 350002, China
  • [ 3 ] [Zhang, Chun-Mei]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • [ 4 ] [Lin, Zhen-Yu]Ministry of Education Key Laboratory of Analysis and Detection Technology for Food Safety, Fuzhou University, Fuzhou 350002, China
  • [ 5 ] [Chen, Chun-Lan]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • [ 6 ] [Yang, Rui]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
  • [ 7 ] [Li, Tian-Tian]Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China

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Source :

Journal of Functional Materials

ISSN: 1001-9731

CN: 50-1099/TH

Year: 2011

Issue: SUPPL. JUNE

Volume: 42

Page: 541-543,548

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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