For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Structure and Magnetic Properties of (Al, Co) Co-Doped ZnO Thin Films
p.299
Synthesis of Biomorphic ZnO Derived from Silk Template
p.303
Effects of Na+ on Spectral Properties of Er3+: CaF2 Transparent Ceramic
p.307
High Pressure Effect on Reaction Synthesis of Ti2SC Powder
p.312
Synthesis and Properties of New Biodegradable Polyurethane Containing Natural Rubber and Poly(lactic Acid): Effect of NR and PLA Ratio
p.317
Preparation and Characterization of Thermoplastic Starch/Wheat Gluten Composites
p.321
The Magnetic Ordering of SiCN Films Prepared by Ion Implantation
p.325
Measuring Electrical Conductivity of Al-Sc Alloy by Application of Continuously Varying Cell Constant Technique
p.329
Transfer Behavior of Clove Oil/β-Cyclodextrin Inclusion Complex in Antibacterial Film Based on PVA
p.333

Synthesis and Properties of New Biodegradable Polyurethane Containing Natural Rubber and Poly(lactic Acid): Effect of NR and PLA Ratio

Article Preview

Abstract:

Biodegradable polyurethane was synthesized using poly(DL-lactic acid) diol and hydroxytelechelic natural rubber as hydroxyl containing precursor, 1,4-butane diol as chain extender, isophorone diisocyanate and dibutyltin dilaurate as catalyst. Poly(DL-lactic acid) diol was prepared by condensation polymerization of DL-lactic acid using 1,4-butane diol as initiator and stannous octoate as catalyst. Hydroxyltelechelic natural rubber synthesized via oxidative degradation of natural rubber and then reduced carbonyl end group to hydroxyl group. Chemical structure of products was characterized by 1H-NMR. Molecular weight and polydispersity determined by SEC. Thermal properties was characterized by DSC and TGA. Segmented polyurethane show two Tgs and two degradation steps corresponding to natural rubber and poly(DL-lactic acid) segment. Polyurethane containing poly(lactic acid) more than 40%mol are become brittle. This result caused by brittle characteristic of PLA. Moreover, mechanical properties increased as content of PLA increased.

You might also be interested in these eBooks
Materials Science and Nanotechnology I View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 531-532)

Pages:

317-320

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.531-532.317

Citation:

Cite this paper

Online since:

December 2012

Authors:

Chuanpit Khaokong, Jinwara Suwanmanee, Jean François Pilard, Pamela Pasetto, Varaporn Tanrattanakul

Keywords:

Biodegradable Polyurethane, Hydroxytelechelic Natural Rubber, Poly(lactic acid) (PLA)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Y. Lu, R.C. Larock: Biomacromolecules Vol. 9 (2008), p.3332.

Google Scholar

[2] C.J. Paul, M.R. Gopinathan Nair, N.R. Neelakantan, P. Koshy, B.B. Idage, A.A. Bhelhekar: Polymer Vol. 39 (1998), p.6861.

DOI: 10.1016/s0032-3861(98)00135-9

Google Scholar

[3] M.N. Radhakrisnan Nair, M.R. Gopinathan Nair: J. Mater. Sci. Vol 43 (2008), p.738.

Google Scholar

[4] S. Gopakumar, M.R. Gopinathan Nair: Polymer Vol. 46 (2005), p.10419.

Google Scholar

[5] K. Hiltunen, J.V. Seppala, M. Harkonen: J. Appl. Polym. Sci. Vol 63 (1997), p.1091.

Google Scholar

[6] K. Hiltunen, J.V. Seppala, M. Itavaara, M. Harkonen: J. Environ. Polym. Degrad. Vol. 5 (1997), p.167.

Google Scholar

[7] J.-B. Zeng, Y.-D.- Li, W.-D. Li, K.-K. Yang, X.-Li. Wang, Y.-Z. Wang: Ind. Eng. Chem. Res. Vol. 48 (2009), p.1706.

Google Scholar

[8] S. Gillier-Ritoit, D. Reyx, I. Campistron, A. Laguerre, R.P. Singh: J. Appl. Polym. Sci. Vol 87 (2003), p.42.

DOI: 10.1002/app.11661

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.