Preparation of a Crosslinked Chitosan Coated Calcium Sulfate Whisker and Its Reinforcement in Polyvinyl Chloride
| Autor: | Lv Zhongfei, Cai Yangben, Cui Jiayang, Xu Shiai, Yuan Wenjin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Vicat softening point
Materials science Polymers and Plastics Flexural modulus Mechanical Engineering Thermal decomposition Composite number Metals and Alloys 02 engineering and technology Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Polyvinyl chloride chemistry.chemical_compound chemistry Mechanics of Materials Ultimate tensile strength Materials Chemistry Ceramics and Composites Glutaraldehyde Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Science & Technology. 32:745-752 |
| ISSN: | 1005-0302 |
| DOI: | 10.1016/j.jmst.2016.06.006 |
| Popis: | A calcium sulfate whisker (CSW) coated with glutaraldehyde crosslinked chitosan (GACS) was prepared to reinforce polyvinyl chloride (PVC) in this study. The results show that the optimum concentration of both chitosan (CS) and glutaraldehyde (GA) is 0.05 wt%. The tensile strength, impact strength, flexural modulus and vicat softening temperature of the PVC composite with 12 wt% of modified CSW are increased by 17.5%, 40.4%, 0.8% and 3.8% compared with those of the PVC composite with 12 wt% of unmodified CSW, and by 2.9%, 42.4%, 27.1% and 6.8% compared with those of pure PVC, respectively. The dynamic mechanical analysis results indicate that the modified CSW/PVC composite exhibits much higher storage modulus and glass transition temperature than those of unmodified CSW/PVC composite and pure PVC. In addition, the modified CSW/PVC composite also demonstrates good thermal properties with a high rapidest decomposition temperature (Trpd) and char residue. The scanning electron microscopy images of tensile-fractured surfaces show that the modified CSW has a strong interfacial adhesion with PVC matrix. |
| Databáze: | OpenAIRE |
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