Distribution & Access For Publication Downloads News About Us Contact Us
Paper Titles
Synthesis of Co-Doped Tialite Ceramic Pigments and Coloring in Glazes
p.299
Synthesis of Perovskite Brown Pigments
p.303
Effects of Strain Rate in Cold-Rolled Pure Copper Produced by Different Rolling Processes
p.307
Preparation of SiC Whiskers by Microwave Heating
p.312
Synthesis and Characterization of Block Copolymer from Natural Rubber, Toluene-2,4-Diisocyanate and Poly(ξ-aprolactone) Diol-Based Polyurethane
p.316
Synthesis and Characterization of Triglyceride-Based Copolymer from Soybean Oil
p.320
Effect of MgO Coating on the Hydration Resistance of MgO-CaO Clinkers
p.324
Preparation of Ca-α-Sialon-SiC Multiphase Ceramics from Gasification Slag
p.328
Rubber Blend of 80/20 NR/SBR Reinforced with Nanosilica and PS-Encapsulated Nanosilica
p.332

Synthesis and Characterization of Block Copolymer from Natural Rubber, Toluene-2,4-Diisocyanate and Poly(ξ-aprolactone) Diol-Based Polyurethane

Article Preview

Abstract:

A new type of polyurethane (PU) has been synthesized by using hydroxyl terminated liquid natural rubber (HTNR) and poly(e-caprolactone) (PCL) as a soft segment and toluene-2,4 diisocyanate (TDI) as a hard segment. This PU becomes a biodegradable and recyclable polymer. The PU samples were synthesized by solution polymerization. TDI/PCL polymerization was prepared in order to determine the appropriate NCO:OH ratio which evaluated from the molecular weight of derived PU and the ratios which were able to form a polymeric film. The suitable NCO:OH ratios were 0.84:1 – 1.20:1 and the Mn of the derived PUs was 3000-5500 g/mol determined by using GPC. PU from PCL-HTNR block copolymer was synthesized by varying molar ratio between PCL and HTNR. HTNR has been synthesized by epoxidation reaction and chain cleavage of natural rubber. The Mn of HTNR was in the range of 1700-8000 g/mol. 1H-NMR and FTIR were used to determine the functional group in order to verify the prepared HTNR and PU. Glass transition temperature and thermal decomposition of PU samples were investigated by using DSC and TGA, respectively.

You might also be interested in these eBooks
Eco-Materials Processing and Design XII View Preview

Info:

Periodical:

Materials Science Forum (Volume 695)

Pages:

316-319

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.695.316

Citation:

Cite this paper

Online since:

July 2011

Authors:

Wannarat Panwiriyarat, Varaporn Tanrattanakul, Jean François Pilard, Chuanpit Khaokong

Keywords:

Biodegradable Polyurethane, Hydroxyl Terminated, Liquid Natural Rubber, Poly(ε-Caprolactone)

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] Flandrin, F.R. Widmaief, J.M. Flat, J.J. Polym. Degrad. Stabil., 57 (1996) 59.

Google Scholar

[2] Paul, C.J., Gorpinathan Nair, M.R. Polym. Eng. Sci., 38 (1998) 440.

Google Scholar

[3] Kebir, N. Campistron, I. Lagurerre, A. Pilard, J.F. Bunel, C. Couvercelle, J.P. Gondard, C. Polymer, 46 (2005) 6869.

Google Scholar

[4] Sukumar, P. Jayashree, V. Gopinathan Nair, M.R. Radhakrishnan Nair, M.N. J. Polym. Sci., 111 (2009) 19.

Google Scholar

[5] Gorna, K. Gogolewski., S. Polym. Degrad. Stabil., 75 (2002) 113.

Google Scholar

[6] Younes, H.M. Grimaldo, E.B. Amsden., B.G. Biomaterials, 25 (2004) 5261.

Google Scholar

[7] Heijkants, R.G.J.C. Calck, R.V. Tienen, T.G. Groot, J.H. Buma, P. Pennings, A.J. Veth, R.P.H. Schouten, A.J. Biomaterials, 26 (2005) 4219.

DOI: 10.1016/j.biomaterials.2004.11.005

Google Scholar

Scientific.Net is a registered brand of Trans Tech Publications Ltd
© 2024 by Trans Tech Publications Ltd. All Rights Reserved