Processing and Properties of Poly (P-Phenylene Benzobisthiazole)/Nylon Fibers
Interim rept. Sep 1983-Sep 1985
MASSACHUSETTS UNIV AMHERST DEPT OF CHEMICAL ENGINEERING
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Polymeric composite fibers of Polyp-phenylene benzobisthiazole PBT and Nylon 6 and Nylon 6,6 were prepared and investigated. The objective was to achieve a composite in which the PBT was dispersed on a molecular level, to enhance reinforcement and mechanical properties. The effects of wet- stretching, heat-treatment time 0.5,1,2 minutes, heat-treatment tension 10- 100 MPa and heat-treatment temperature 215 C - 295 C on tensile properties were studied. Also, the influence of the nylon molecular weight 13700 and 17500 gmole for Nylon 6,6 and 14500 and 20000 gmole for Nylon 6 on composite fiber properties was studied. Moduli of 40 GPa and tensile strengths of 375 MPa were achieved for 3070 PBTnylon composites. Extended heat treatment of the nylon PBT fibers at 160 C to 225 C for periods of 12 to 19 hours increased to tensile modulus values by 20 to 50 and the tensile strengths by 1 to 14. The inherent viscosity of the nylons increased for 12 to 108 as a result of extended heat treatment, indicating an increased in molecular weight.
- Laminates and Composite Materials