Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-28T11:17:09.320Z Has data issue: false hasContentIssue false
  • English
  • Français

Crystallization behavior and thermal properties of biodegradable poly(L-lactide)-poly(ethylene glycol) block copolymers

Published online by Cambridge University Press:  03 April 2013

Hsin-Jiant Liu ,
Hawn-Chung Chu ,
Li-Huei Lin  and
Jia-He Wu
Hsin-Jiant Liu
Affiliation:
General Education Center, Vanung University, Chung-Li City, Tao-Yuan County, Taiwan, Republic of China
Hawn-Chung Chu*
Affiliation:
Department of Chemical and Materials Engineering, Lee-Ming Institute of Technology, Taishan, New Taipei City, Taiwan, Republic of China
Li-Huei Lin
Affiliation:
Department of Cosmetic Science, Vanung University, Chung-Li City, Tao-Yuan County, Taiwan, Republic of China
Jia-He Wu
Affiliation:
Department of Materials Science and Engineering, Vanung University, Chung-Li City, Tao-Yuan County, Taiwan, Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

This study presents a polymerization of L-lactide and poly(ethylene glycol) of various molecular weights to produce biodegradable poly(L-lactide)-poly(ethylene glycol) (L-PEG) block copolymers. The chemical structures, crystallization behavior and thermal properties of L-PEG copolymers were investigated using proton nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, gel permeation chromatography, thermogravimetric analysis and differential scanning calorimetry (DSC). The analysis of isothermal crystallization behavior of L-PEG copolymers using the Avrami equation revealed that the grain growth of L-PEG200 and 600 were unstable, jumping between one dimension and two dimensions. By contrast, the grain growth of L-PEG2000 was more stable, with a growth trend toward three dimensions. The results of L-PEG isothermal crystallization by DSC indicate that within a range of 123–127 °C, the crystallization rate was higher at lower temperatures. The values of the crystallization constants in the Avrami equation were also lower.

Keywords

crystal growthinfrared (IR) spectroscopypolymer
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 8 , 28 April 2013 , pp. 1111 - 1117
Copyright
Copyright © Materials Research Society 2013

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Jia, Z., Zhang, K., Tan, J., Han, C., Dong, L., and Yang, Y.: Crystallization behavior and mechanical properties of crosslinked plasticized poly(L-lactic acid). J. Appl. Polym. Sci. 111, 1530 (2009).Google Scholar
Mothé, C.G., Azevedo, A.D., Rumond, W.S., and Wang, S.H.: Thermal properties of amphiphilic biodegradable triblock copolymer of L, L-lactide and ethylene glycol. J. Therm. Anal. Calorim. 101, 229 (2010).Google Scholar
Rincon Lasprilla, A.J., Rueda Martinez, G.A., Lunelli, B.H., Jaimes Figueroa, J.E., Jardini, A.L., and Filho, R.M.: Synthesis and characterization of poly (lactic acid) for use in biomedical field. Chem. Eng. Trans. 24, 985 (2011).Google Scholar
Li, Y., Venkateshan, K., and Sun, X.S.: Mechanical and thermal properties, morphology and relaxation characteristics of poly(lactic acid) and soy flour/wood flour blends. Polym. Int. 59, 1099 (2010).CrossRefGoogle Scholar
Nguyen, T.H., Petchsuk, A., Tangboriboonrat, P., Opaprakasit, M., Sharp, A., and Opaprakasit, P.: Synthesis and characterizations of PLLA/PEG block copolymers. Adv. Mater. Res. 93–94, 198 (2010).Google Scholar
Velthoen, I.W., Beek, J.V., Dijkstra, P.J., and Feijen, J.: Thermo-responsive hydrogels based on highly branched poly(ethylene glycol)–poly(L-lactide) copolymers. React. Funct. Polym. 71, 245 (2011).Google Scholar
Hu, X., Xu, J.Z., Zhong, G.J., Luo, X.L., and Li, Z.M.: Shear induced crystallization of poly(L-lactide) and poly(ethylene glycol) (PLLA-PEG-PLLA) copolymers with different block length. J. Polym. Res. 18, 675 (2011).Google Scholar
Wu, T., He, Y., Fan, Z., Jia Wei, J., and Li, S.: Investigations on the morphology and melt crystallization of poly(L-lactide)-poly(ethylene glycol) diblock copolymers. Polym. Eng. Sci. 48, 425 (2008).CrossRefGoogle Scholar
Liu, Y., Wang, L., He, Y., Fan, Z., and Li, S.: Non-isothermal crystallization kinetics of poly(L-lactide). Polym. Int. 59, 1616 (2010).CrossRefGoogle Scholar
Yang, G.Z., Chen, X., Xu, Y., Li, C.Z., Wu, P., and Liu, T.: Nonisothermal crystallization behavior of a luminescent conjugated polymer, poly(9,9-dihexylfluorene-alt-2,5-didodecyloxybenzene). Polym. Int. 56, 245 (2007).Google Scholar
Yang, Y. and Qiu, Z.: Crystallization and melting behavior of biodegradable poly(ethylene succinate-co-6 mol % butylene succinate). J. Appl. Polym. Sci. 122(1), 105 (2011).Google Scholar
More, A.S., Pasale, S.K., Honkhambe, P.N., and Wadgaonkar, P.P.: Synthesis and characterization of organo-soluble poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing pendant pentadecyl chains. J. Appl. Polym. Sci. 121(6), 3689 (2011).CrossRefGoogle Scholar
Sonmez, H.B., Karadag, K., and Onaran, G.: Synthesis and swelling properties of crosslinked poly(orthosilicate)s from cyclohexanedimethanols. J. Appl. Polym. Sci. 122(2), 1182 (2011).Google Scholar
Wu, B., Gong, Y., and Yang, G.: Non-isothermal crystallization of polyamide 6 matrix in all-polyamide composites: Crystallization kinetic, melting behavior, and crystal morphology. J. Mater. Sci. 46(15), 5184 (2011).CrossRefGoogle Scholar