Epoxidized natural rubber-based nanostructured polymer blends / Chan Chin Han

Chan, Chin Han (2010) Epoxidized natural rubber-based nanostructured polymer blends / Chan Chin Han. [Research Reports] (Unpublished)

Abstract

Blends of poly(3-hydroxybutyrate-<?0-3-hydroxy valerate) (PHBV) with 12 mol% hydroxy valerate (HV) content and epoxidized natural rubber (ENR) with 50 mol% epoxidation level were studied along with the thermal properties and morphologies. Glass transition temperatures reveal immiscibility of the polymers over the entire composition range. The equilibrium melting point (Tm°) of PHBV in blends was determined applying Hoffman-Weeks step-wise annealing procedure. There is no significant variation of Tm° for PHBV with blend composition. Also the crystallinity of PHBV stays approximately constant in the blends, only a slight decrease might be recognized with increasing ENR content. The rate of crystallization of PHBV decreases with PHBV content according to a power law. Morphological studies by polarizing optical microscopy reveal a fine intraspherulitic dispersion of ENR in volume-filling PHBV spherulites, which develop during isothermal crystallization.

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Item Type: Research Reports
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Chan, Chin Han
UNSPECIFIED
Subjects: Q Science > QC Physics > Atomic physics. Constitution and properties of matter > Nanostructures
Q Science > QD Chemistry > Organic chemistry > Polymers. Macromolecules
Divisions: Universiti Teknologi MARA, Shah Alam > Research Management Centre (RMC)
Keywords: Epoxidized natural rubber-based; Nanostructured; Polymer blends
Date: 2010
URI: https://ir.uitm.edu.my/id/eprint/21730
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