期刊
CARBOHYDRATE POLYMERS
卷 87, 期 4, 页码 2447-2454出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.11.022
关键词
Ethyl cellulose; Poly(3-hydroxybutyrate-co-3-hydroxyvalerate); Graft copolymer; Crystallization behavior; Hydrophobic property
资金
- key basic research foundation of the Committee of Science and Technology of Shanghai Municipality [06JC14003]
- Fundamental Research Funds for the Central Universities
- Doctorate Innovation Foundation of Donghua University [BC201101]
The copolymerization of grafting poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) onto ethyl cellulose (EC) was carried out through the homogeneous acylation reaction between EC as a backbone and telechelic OH-terminated PHBV oligomer as side chains in 1,2-dichloroethane by using 1,6-hexamethylene diisocyanate (HDI) as a coupling agent and dibutyltin dilaurate as catalyst. The resulting copolymers were studied by using NMR, FT-IR, WAXD, DSC, and contact angle measurements. It is found that with the increasing of the HDI/PHBV fraction, a transition exhibition occurred on crystallization behavior and hydrophobic properties, which could be modulated through controlling the lengths and grafting densities of PHBV side chains. Compared with those of neat PHBV, the degree of crystallinity for EC-g-PHBV1.8 decreased from 58.1% to 39.1%, the maximum decomposition temperature increased from 259.6 to 266.3 degrees C, and the contact angle increased from 60.1 degrees to 95.7 degrees. (C) 2011 Elsevier Ltd. All rights reserved.
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