Polyimide nanocomposites composites

There are two main areas where polyimide nanocomposites have been investigated by the author as a means of enhancing the performance of composites ... 

Siochi EJ, Working DC, ParkC, LflleheiPT, Rouse JH, Topping CC, et al. Melt processing of SWNT-polyimide nanocomposite fibres. Composites B 2004 35 439 46. 

Gintert MJ, Jana SC et al (2007) A novel strategy for nanoday exfoliation in thermoset polyimide nanocomposite systems. Polymer 48 4166 Gojny FH, Nastalczyk J et al (2003) Surfaa modified multi-walled carbon nanotubes in CNT/epoxy-composites. Chem Phys Lett 370 820 Gojny FH, Wichmann MHG et al (2004) Carbon nanotube-reinforced epoxy-composites enhanced stiffness and fracture toughness at low nanotube content. Composites Sci Tech 64 2363 Gojny FH, Wichmann MHG et al (2006) Evaluation and identification of electrical and thermal conduction mechanisms in carbon nanotube/epoxy composites. Polymer 47 2036... 

Siochi, E.J., et al.. Melt processing of SWCNT - polyimide nanocomposite fibers. Composites Part B - Engineering, 2004. 35(5) p. 439-446. 

For bulk materials, Jin et al fabricated poly (methylmethacrylate) (PMMA)/MWNT nanocomposites by melt mixing. MWNTs were well dispersed in the matrix [90]. Melt compounding is also widely used for the fabrication of composite fibers. Sandler et al mixed polyamide-12 pellets and CNTs in a twin-screw micro-extruder and then the extrudate was chopped and fed into a capillary rheometer with 1 mm die. The CNTs in the spun fibers were uniformly dispersed [91]. Not only can thermoplastic polymers be melt-compounded, polyimide, a thermoset plastic, can be also prepared by mixing the imide oligomer at 320 °C on a steel plate and then cured at 370°C. It was found that the dispersion of CNTs in... 

This technique has found the following applications in addition to those discussed in Sections 10.1 (resin cure studies on phenol urethane compositions) [65], 12.2 (photopolymer studies [66-68]), and 13.3 (phase transitions in PE) [66], Chapter 15 (viscoelastic and rheological properties), and Section 16.4 (heat deflection temperatures) epoxy resin-amine system [67], cured acrylate-terminated unsaturated copolymers [68], PE and PP foam [69], ethylene-propylene-diene terpolymers [70], natural rubbers [71, 72], polyester-based clear coat resins [73], polyvinyl esters and unsaturated polyester resins [74], polyimide-clay nanocomposites [75], polyether sulfone-styrene-acrylonitrile, PS-polymethyl methacrylate (PMMA) blends and PS-polytetrafluoroethylene PMMA copolymers [76], cyanate ester resin-carbon fibre composites [77], polycyanate epoxy resins [78], and styrenic copolymers [79]. 

The highest heat distortion temperature of 400°C flexural modulus (1.1 x 10 psi) and flexural strength (30,000 psi) of polyimide-montmorillonite clay nanocomposites made this polymer composite outstanding. 

Polyimides (PI) are widely used in microelectronics and photonics because of their outstanding electrical properties, heat resistance, and chemical stability [10-12], Pl/clay nanocomposites have been reported to reduce the coefficient of thermal expansion, amount of moisture absorption, and dielectric constant for improved performance in these application areas already mentioned [13-22], For example, Yano et al. [13] prepared a PI (pyromellitic anhydride-4,4 -oxydianiline)/clay composite film [(PMDA-ODA)/clay] by solution-mixing of polyamic acid (PAA) and a dimethylacetamide (DMA) dispersion of clay. They used dodecylamine as the clay modifier, and the film showed reduced thermal... 

Chou, W.J., Wang, C.C., and Chen, C.Y. (2008) Characteristics of polyimide-based nanocomposites containing plasma modified multi-walled carbon nanotubes. Composites Science and Technology, 68, 2208-2213. 

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