Crystallisation and mechanical properties of poly(3-hydroxybutyrate-co-hydroxyvalerate)/polypropylene blends
| Autor: | Liang Chen, Jian Xu, Zong Yi Qin |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Polypropylene
Materials science Scanning electron microscope Mechanical Engineering Nucleation Maleic anhydride Condensed Matter Physics law.invention chemistry.chemical_compound Differential scanning calorimetry chemistry Mechanics of Materials law Ultimate tensile strength General Materials Science Elongation Crystallization Composite material |
| Zdroj: | Materials Research Innovations. 18:S4-848 |
| ISSN: | 1433-075X 1432-8917 |
| Popis: | Poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) was melt blended with polypropylene (PP) with maleic anhydride grafted PP (MPP) used as the reactive compatibiliser. The PHBV/PP (97·5/2·5) blend exhibited optimum elongation at break. Scanning electron microscopy exhibited that the PP phase was dispersed evenly within the PHBV matrix; a reduction in the domain size of the PP phase and plastic deformation of PP were observed with the addition of MPP. Differential scanning calorimetry studies showed that PP enhanced the crystallisation of PHBV, while MPP weakened it. Polarised optical microscopy results demonstrated that small spherulites of PP were effective PHBV nucleation agents, whereas MPP restrained the nucleation of PHBV. The results of tensile tests revealed that the elongation of the blends improved after the addition of MPP and increased with increasing concentration of MPP. The blend containing 2·5 wt-%PP with MPP content of 3 wt-% exhibited the best toughness, increasing 295·7% compared ... |
| Databáze: | OpenAIRE |
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