Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/75667
Title: Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate
Authors: Zhang, L. 
Deng, X.
Zhao, S.
Huang, Z.
Keywords: Blend
Hydroxyethyl cellulose acetate
Poly3-hydroxybutyrate
Issue Date: Nov-1997
Citation: Zhang, L.,Deng, X.,Zhao, S.,Huang, Z. (1997-11). Biodegradable polymer blends of poly(3-hydroxybutyrate) and hydroxyethyl cellulose acetate. Polymer 38 (24) : 6001-6007. ScholarBank@NUS Repository.
Abstract: The melting and crystallization behaviour and phase morphology of poly(3-hydroxybutyrate) (PHB) and hydroxyethyl cellulose acetate (HECA) blends prepared by casting films have been studied by differential scanning calorimetry (d.s.c.), Fourier transform infra-red (FTi.r.), scanning electron microscopy and polarizing optical microscopy. The melting temperatures of PHB in the blends were independent of the blend composition with PHB contents above 20%. The melting enthalpy of the blends decreased with increase in the HECA component and was close to the additive value of the enthalpy of the two components. The glass transition temperatures of PHB in the blend were constant at about 8°C. No specific interaction between the two components was found by FTi.r. The crystallization of PHB in the blend was affected by the HECA component, especially in the PHB/HECA (20/80) blend. During the d.s.c. cooling run at a lower cooling rate, two separate transitions were found for PHB/HECA (80/20), (60/40) and (40/60) blends, which corresponded to the crystallization of PHB and the phase transition of HECA from an isotropic phase to a mesophase in the blends, respectively. The phase transformation of HECA from an isotropic phase to a mesophase was almost independent of the PHB component. © 1997 Elsevier Science Ltd.
Source Title: Polymer
URI: http://scholarbank.nus.edu.sg/handle/10635/75667
ISSN: 00323861
Appears in Collections:Staff Publications

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