Abstract
Novel high thermally stable polyimide-chrysotile (PI-Chr) composites were synthesized. Firstly, Chrysotile (Chr) was modified with 3-aminopropyltriethoxysilane (APS). Poly(amic acid) solution was synthesized from pyromellitic dianhydride (PMDA) and 4,4′-diaminodiphenyl ether. Then, PI-Chr composites were prepared from poly(amic acid) solution and different ratios of modified Chr. Prepared PI-Chr composites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray spectroscopy and thermal analysis techniques. Thermal analysis results showed that the PI-Chr composites have higher decomposition temperatures in comparison with the pure PIs. A 10% weight loss belonging to PI-Chr composites was observed between 489°C and 536°C in air atmosphere, but this value was 468°C in air for pure PIs. The glass transition temperatures (Tg s) of the PI-Chr composites were 373°C–384°C, depending upon the amount of the Chr. PI-Chr composites exhibited improved thermal stability. The activation energies (Ea s) of the thermal degradation reaction were calculated using the Kissinger method for pure PI and composites. The Ea s of the PI-Chr composites were found to be 77 and ∼117 kJ/mol. The fire retardant properties of Chr in the PI matrix were also tested by the total heat release test. The introduction of Chr in the composites leads to a slight increase in fire retardant properties thermal stability.
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©2014 by De Gruyter
Articles in the same Issue
- Frontmatter
- Original articles
- Curing kinetics of styrene-(ethylene-butylene)-styrene (SEBS) copolymer by peroxides in the presence of co-agents
- Synthesis and properties of novel high thermally stable polyimide-chrysotile composites as fire retardant materials
- Flame-resistant polymeric composite fibers based on nanocoating flame retardant: thermogravimetric study and production of α-Al2O3 nanoparticles by flame combustion
- Mechanical and morphological properties of high density polyethylene and polylactide blends
- Synthesis and characterization of magnetic Ni0.3 Zn0.7 Fe2 O4/polyvinyl acetate (PVAC) nanocomposite
- Effect of titanium nanofiller on the productivity and crystallinity of ethylene and propylene copolymer
- Mechanical properties of potassium hydroxide-pretreated Christmas palm fiber-reinforced polyester composites: characterization study, modeling and optimization
- Natural frequency response of laminated hybrid composite beams with and without cutouts
- Characterization of C2H2O4 doped PVA solid polymer electrolyte
- Development and characterization of homo, co and terpolyimides based on BPDA, BTDA, 6FDA and ODA with low dielectric constant
- Highly-filled hybrid composites prepared using centrifugal deposition
- Reinforcement of carboxylated acrylonitrile-butadiene rubber (XNBR) with graphene nanoplatelets with varying surface area
- Multiple melting behavior of poly(lactic acid)-hemp-silica composites using modulated-temperature differential scanning calorimetry
Articles in the same Issue
- Frontmatter
- Original articles
- Curing kinetics of styrene-(ethylene-butylene)-styrene (SEBS) copolymer by peroxides in the presence of co-agents
- Synthesis and properties of novel high thermally stable polyimide-chrysotile composites as fire retardant materials
- Flame-resistant polymeric composite fibers based on nanocoating flame retardant: thermogravimetric study and production of α-Al2O3 nanoparticles by flame combustion
- Mechanical and morphological properties of high density polyethylene and polylactide blends
- Synthesis and characterization of magnetic Ni0.3 Zn0.7 Fe2 O4/polyvinyl acetate (PVAC) nanocomposite
- Effect of titanium nanofiller on the productivity and crystallinity of ethylene and propylene copolymer
- Mechanical properties of potassium hydroxide-pretreated Christmas palm fiber-reinforced polyester composites: characterization study, modeling and optimization
- Natural frequency response of laminated hybrid composite beams with and without cutouts
- Characterization of C2H2O4 doped PVA solid polymer electrolyte
- Development and characterization of homo, co and terpolyimides based on BPDA, BTDA, 6FDA and ODA with low dielectric constant
- Highly-filled hybrid composites prepared using centrifugal deposition
- Reinforcement of carboxylated acrylonitrile-butadiene rubber (XNBR) with graphene nanoplatelets with varying surface area
- Multiple melting behavior of poly(lactic acid)-hemp-silica composites using modulated-temperature differential scanning calorimetry