Studies on the combined effect of injection temperature and fiber content on the properties of polypropylene-glass fiber composites

Autor:	K. G. Satyanarayana, W.N. Ota, Sandro Campos Amico
Rok vydání:	2005
Předmět:	Polypropylene Materials science Glass fiber General Engineering chemistry.chemical_compound Crystallinity chemistry Ultimate tensile strength Ceramics and Composites Thermal stability Fiber Composite material Elastic modulus Melt flow index
Zdroj:	Composites Science and Technology. 65:873-881
ISSN:	0266-3538
DOI:	10.1016/j.compscitech.2004.10.025
Popis:	This paper focuses on correlations between physical and mechanical properties of polypropylene (PP) and PP/glass fiber composites molded at different injection temperatures and fiber weight fractions (20% and 30% w/w). Density, melt flow index (MFI), thermal stability, crystallinity and tensile and impact properties have been evaluated. The MFI of the composites was dependent on fiber content, fiber length distributions, a slight additional thermal protection due to the fibers and PP chain scission. The tensile strength and elastic modulus of the PP-composites increased linearly with fiber content. Injection temperature was shown to decrease elastic modulus to a point that the different composites showed statistically comparable rigidities. These properties have been discussed in the light of microstructural changes studied by SEM.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c8b4fc879f472bc27128838a2c9c5f1e https://doi.org/10.1016/j.compscitech.2004.10.025 Zobrazit plný text záznamu Full Text from ScienceDirect