Highly expanded, highly insulating polypropylene/polybutylene-terephthalate composite foams manufactured by nano-fibrillation technology
| Autor: | Raymond K.M. Chu, Chongxiang Zhao, Patrick C. Lee, Eunse Chang, Lun Howe Mark, Chul B. Park |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Composite number 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Thermal insulation Phase (matter) lcsh:TA401-492 General Materials Science Fiber Composite material Polypropylene chemistry.chemical_classification business.industry Mechanical Engineering Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Polybutylene terephthalate chemistry Mechanics of Materials lcsh:Materials of engineering and construction. Mechanics of materials Melt spinning 0210 nano-technology business |
| Zdroj: | Materials & Design, Vol 188, Iss, Pp-(2020) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2019.108450 |
| Popis: | This paper presents a new nano-fibrillation method to produce highly expanded microcellular polypropylene (PP) foams with high thermal insulation properties. Polybutylene terephthalate (PBT) nano-fibrils were formed in the PP matrix through a melt spinning process to increase the foamability of PP resins which have inherently low melt strength. In this process, the two immiscible polymer phases are extruded and drawn into fibers. In the fiber composite, the PBT nano-fibrillar reinforcement phase typically has an average diameter of less than 200 nm. The results show that the presence of the long aspect-ratio nano-fibrils enhances the foamability of the PP matrix, and the foamed samples achieved high thermal insulation properties (~32 mW∙m−1∙K−1). As the capital investment and development time costs of the existing technologies for improving foamability are high, the new manufacturing method can provide significant economic and technical advantages for producing highly expanded and insulating PP-based foams. Keywords: Nano-fibrillar composite, Microcellular foam, Thermal insulation material |
| Databáze: | OpenAIRE |
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