Poly (propylene carbonate)-based in situ nanofibrillar biocomposites with enhanced miscibility, dynamic mechanical properties, rheological behavior and extrusion foaming ability
| Autor: | Kaican Li, Xiangfang Peng, Bin-Yi Chen, Tairong Kuang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering 02 engineering and technology Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Miscibility Industrial and Manufacturing Engineering 0104 chemical sciences Polybutylene succinate chemistry.chemical_compound Compressive strength Rheology chemistry Mechanics of Materials Propylene carbonate Ceramics and Composites Extrusion Composite material 0210 nano-technology Glass transition |
| Zdroj: | Composites Part B: Engineering. 123:112-123 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/j.compositesb.2017.05.015 |
| Popis: | Poly (propylene carbonate) (PPC) foams have attracted more attention in recent years because of their biodegradability and the fixation of carbon dioxide (CO 2 ). Despite their many attractive features, a relatively low decomposition temperature, a low glass transition temperature (T g ), weak mechanical properties and poor melt strength of PPC matrix limited their commercial applications as a viable candidate for conventional plastics. In this study, we report a facile, effective, low-cost and eco-friendly approach for the preparation of PPC/PBS/PTFE ternary in situ nano-fibrillar biocomposites to significantly improve the strength and foaming ability of PPC without sacrificing their excellent biodegradability. The in situ nano-fibrillar networks in the PPC/PBS matrix demonstrated that significant reinforcement effects on the matrix strength, dynamic mechanical and rheological properties at low PTFE contents. In contrast to pure PPC, T g increased by 15 °C, 851% higher in storage modulus and 17 times enhancement in the initial viscosity of biocomposites. In continues extrusion foaming process, the PBS domains and PTFE nano-fibrils network generated remarkable synergistic effects on the foaming behavior, resulted in higher cell densities (two orders of magnitude), compressive modulus (30 times) and compressive strength (20 times) of PPC/PBS/PTFE (70/30/3) biocomposites. |
| Databáze: | OpenAIRE |
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