An optimum organic treatment of nanoclay for PMR-15 nanocomposites

Gintert, Michael J.; Jana, Sadhan C.; Miller, Sandi G.

doi:10.1016/j.polymer.2007.11.004

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…Exfoliated nanoscale layered silicates, with a platelet morphology and high aspect ratio, have become recognized as a useful filler in polymer matrix composites. A number of studies have been conducted in an attempt to further improve the mechanical and thermal properties by dispersing layered silicate into PMR-15 polyimide [6][7][8][9][10][11][12][13][14] advantages of combining aromatic and aliphatic surfactants to treat clay for PMR type polyimide composites have been reported by Campbell S [12].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of nanoclay modified PMR type polyimide composites reinforced with 3D woven basalt fabric

Xie

Qiu

2009

SPIE Proceedings

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Nanoclay modified PMR type polyimide composites were prepared from 3D orthogonal woven basalt fiber performs and nanoclay modified polyimide matrix resin, which derived from methylene dianiline (MDA), dimethyl ester of 3,3',4,4'-oxydiphthalic acid (ODPE), monomethyl ester of cis-5-norbornene-endo-2,3-dicarboxylic acid (NE) and nanoclay. The Na + -montmorillonite was organically treated using a 1:1 molar ratio mixture of dodecylamine (C12) and MDA. The rheological properties of neat B-stage PMR polyimide and 2% clay modified B-stage PMR polyimide were investigated. Based on the results obtained from the rheological tests, a two step compression molding process can be established for the composites. In the first step, the 3D fabric preforms were impregnated with polyimide resin in a vacuum oven and heated up for degassing the volatiles and by-products. In the second step, composites were compressed. The internal structure of the composites was observed by a microscope. Incorporation of 2% clay showed an improvement in the T g and stiffness of the PMR polyimide. The resulting composites exhibited high thermal stability and good mechanical properties.

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