Polymer blends of poly(3-Hydroxybutyrate-CO-3-Hydroxyhexanoate) and epoxidized natural rubber / Yoga Sugama Salim

Yoga Sugama, Salim (2016) Polymer blends of poly(3-Hydroxybutyrate-CO-3-Hydroxyhexanoate) and epoxidized natural rubber / Yoga Sugama Salim. PhD thesis, University of Malaya.

[img] PDF (The Candidate's Agreement)
Restricted to Repository staff only

Download (181Kb)
    [img]
    Preview
    PDF (Thesis PhD)
    Download (6Mb) | Preview

      Abstract

      Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)] is a biodegradable polyester from the family of polyhydroxyalkanoates. In the first part of this study, the thermal influence on the molecular mass and isothermal crystallization kinetics of P(3HB-co-3HHx) were investigated. The molecular mass decreases with increasing isothermal holding temperature and time. Avrami model has been successfully used to describe the isothermal crystallization kinetics of P(3HB-co-3HHx). Following the initial outcome, P(3HB-co-3HHx) was blended with epoxidized natural rubber (ENR). The blend is expected to yield polymers with combination mechanical or thermal properties. It is shown that ENR promotes the isothermal crystallization rate of P(3HBco-3HHx) despite forming immiscible constituents with P(3HB-co-3HHx). The thermal property of P(3HB-co-3HHx) is influenced by the presence of ENR after isothermal crystallization. Further experimental result shows that the P(3HB-co-3HHx) and ENR can be reacted in-situ using differential scanning calorimeter. The kinetic of melt reaction shows good approximation and similar behavior to that of other melt reaction systems such as poly(3-hydroxybutyrate)/ENR and poly (3-hydroxybutyrate-co-3- hydroxyvalerate)/ENR blends.

      Item Type: Thesis (PhD)
      Additional Information: Thesis (PhD) - Faculty of Science, University of Malaya, 2016.
      Uncontrolled Keywords: Polymer; Natural rubber; Molecular mass; Crystallization; Energy
      Subjects: Q Science > Q Science (General)
      Q Science > QD Chemistry
      Divisions: Faculty of Science
      Depositing User: Mr Mohd Safri Tahir
      Date Deposited: 23 Dec 2019 07:54
      Last Modified: 17 Aug 2020 07:30
      URI: http://studentsrepo.um.edu.my/id/eprint/10760

      Actions (For repository staff only : Login required)

      View Item