Effect of dimethyl sulfoxide on synthesis of thermoplastic cellulose-Graft-poly(l-lactide) copolymer using ionic liquid as reaction media

ABSTRACT In this study, ring‐opening graft polymerization of l‐lactide onto cellulose was carried out homogeneously in ionic liquid (IL)/dimethyl sulfoxide (DMSO) co‐solvent as a reaction media. Through the effective control of high viscosity and steric hindrance caused by the interaction between th...

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Bibliographic Details
Published in:Journal of applied polymer science 2015-01, Vol.132 (4), p.np-n/a
Main Authors: Lee, Sung Jun, Lee, Hae Sung, Jeong, Sang Won, Kim, Hyun-Chul, Lee, Se Geun, Oh, Tae Hwan
Format: Article
Language:English
Subjects:
biomaterials
Cellulose
cellulose and other wood products
Copolymers
Dimethyl sulfoxide
Graft copolymers
Ionic liquids
Materials science
Media
Polymers
Synthesis
thermoplastics
Transition temperature
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Summary:ABSTRACT In this study, ring‐opening graft polymerization of l‐lactide onto cellulose was carried out homogeneously in ionic liquid (IL)/dimethyl sulfoxide (DMSO) co‐solvent as a reaction media. Through the effective control of high viscosity and steric hindrance caused by the interaction between the IL and the hydroxyl group of cellulose by adding DMSO as a co‐solvent, cellulose‐graft‐poly(l‐lactide) (Cell‐g‐PLLA) copolymer with higher substitution efficiency was successfully prepared, at relatively low concentration of l‐lactide. The maximum values of molar substitution, degree of lactyl substitution, and degree of polymerization of poly(l‐lactide) in the copolymer were 3.76, 1.74, and 2.16, respectively, determined by 1H‐NMR. The prepared cell‐g‐PLLA copolymers showed thermal plasticization with a glass transition temperature of 155°C. In addition, the thermal processibility could be improved as the amount of grafted PLLA in the copolymer increased. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41331.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.41331