Thesis
Investigation of crystallization of poly(3-hydroxybutyrate-CO-3-hydroxyvalerates) and their bamboo fiber reinforced composites
Washington State University
Master of Science (MS), Washington State University
2006
Handle:
https://hdl.handle.net/2376/103376
Abstract
Based on renewable resources and with good mechanical properties, bamboo pulp fiber (BPF) reinforced poly(3-hydroxybutyrate-co-3-hydroxyvalerates) (PHBVs) composites have the potential to replace petrochemical polymer based composites in many applications. In this study, nucleation and crystallization of PHBVs in neat forms and in composites and its effects on properties, and the effects of coupling agent or compatibilizer on physical properties and mechanical properties, were investigated. Crystallization kinetics of PHBVs (containing 8, 12 and 21 mol% 3-hydroxyvalerate), nucleated with boron nitride, thymine and melamine, were studied. The results indicate that all three nucleating agents increased the overall crystallization rate of PHBVs, with boron nitride and thymine being superior to melamine. Adding nucleating agent also improved the mechanical properties of the composites. BPF demonstrated excellent reinforcing effects, and it improved not only tensile and flexural properties but also impact strength. Addition of polydiphenylmrthane diisocyanate and maleic anhydride grafted PHBV greatly improved the interfacial adhesion in the composites, as seen in the increases in mechanical and dynamic mechanical properties and fewer fiber pullouts at the fracture surfaces.
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Details
- Title
- Investigation of crystallization of poly(3-hydroxybutyrate-CO-3-hydroxyvalerates) and their bamboo fiber reinforced composites
- Creators
- Jun Qian
- Contributors
- Jinwen Zhang (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525157201842
- Language
- English
- Resource Type
- Thesis