Degree Type

Dissertation

Date of Award

1991

Degree Name

Doctor of Philosophy

Department

Industrial Education and Technology

First Advisor

William Wolansky

Abstract

The study was designed to investigate the effects of time and temperature on the mechanical property of hardness of a polycarbonate (thermoplastic) matrix, to achieve an 80% glass loading to a 20% wet-out for the polycarbonate pre-impregnated rod, to develop the prototype pultrusion equipment for polycarbonate pre-impregnated rod, and to develop the prototype pulforming equipment for polycarbonate fibersteel composite rod. Fibersteel rod is composed of seven pre-impregnated rods twisted into a spiral shape to act as a substitute for steel reinforcement rod in concrete;A polycarbonate matrix which had been solvent treated was tested according to Rockwell Hardness Test (ASTM 785). An 80% glass loading was achieved by implementing a resin wet-out tank, which contains rollers designed to spread and submerge fibers in a polycarbonate/solvent solution. Percent of glass loading was obtained according to Ignition Test (ASTM 2584). Prototype pultrusion and pulforming equipment was designed and built at Iowa State University, Ames, Iowa;There were significant differences among all different temperature and speed combinations for the Rockwell Hardness on the polycarbonate matrix. An 80% glass loading was achieved for long glass fiber embedment in a polycarbonate pre-impregnated rod. Processing parameters have been established for both the pultrusion and pulforming processes.

DOI

https://doi.org/10.31274/rtd-180813-9225

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Jeong Goo Lee

Language

en

Proquest ID

AAI9126212

File Format

application/pdf

File Size

141 pages

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