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- Title
Effect of dimethyl sulfoxide on synthesis of thermoplastic cellulose- Graft-poly( l-lactide) copolymer using ionic liquid as reaction media.
- Authors
Lee, Sung Jun; Lee, Hae Sung; Jeong, Sang Won; Kim, Hyun‐Chul; Lee, Se Geun; Oh, Tae Hwan
- Abstract
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.
- Subjects
DIMETHYL sulfoxide; LACTIDES; THERMOPLASTIC composites; COPOLYMERS; IONIC liquids; BIOMATERIALS; WOOD chemistry
- Publication
Journal of Applied Polymer Science, 2015, Vol 132, Issue 4, pn/a
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.41331