Manipulating the structure of medium-chain-length polyhydroxyalkanoate (MCL-PHA) to enhance thermal properties and crystallization kinetics
| Autor: | Juliana A. Ramsay, Bruce A. Ramsay, Marianna Kontopoulou, Salim Gopi |
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| Rok vydání: | 2018 |
| Předmět: |
Exothermic reaction
Phase transition Kinetics 02 engineering and technology 010402 general chemistry Branching (polymer chemistry) 01 natural sciences Biochemistry Polyhydroxyalkanoates Phase Transition law.invention Crystallinity Structural Biology law Crystallization Molecular Biology Chemistry Temperature Chemical modification General Medicine 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering 0210 nano-technology |
| Zdroj: | International journal of biological macromolecules. 119 |
| ISSN: | 1879-0003 |
| Popis: | We investigated the effects of the structure of medium-chain-length polyhydroxyalkanoates (MCL-PHAs) on their thermal properties and crystallization kinetics. The predominantly homopolymeric poly(3-hydroxydecanoate), P(3HD)-98, and the poly(3-hydroxydodecanoate), P(3HDD), exhibited sharp crystallization peaks upon cooling, with the latter exhibiting faster crystallization rates. A chemical modification strategy involving reaction with dicumyl peroxide and triallyl trimesate coagent was implemented to introduce branching and enhance the crystallization kinetics of P(3HD-98). Increases in the exothermic crystallization temperature by 8 °C and in the overall crystallinity of the P(3HD)-98 were observed upon chemical modification. The Avrami crystallization kinetic parameters obtained by fitting the isothermal crystallization data revealed a significant increase in the crystallization rate of the modified P(3HD)-98. |
| Databáze: | OpenAIRE |
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