| Summary: | 碩士 === 文化大學 === 造紙印刷研究所 === 83 === This study presents a proprietary process devoloped to manu-
facture pultruded hybrided fiber reinforced VE composites.
The effect of processing parameters on the mechanical
properties ( flexural;tensile strength and modulus; impact
strength ,etc.) of pultruded hybridized(Glass/Rayon) fiber
reinforced vinyl ester ( VE) composites rates, die
temperatures, postcure temperature and time,and hybridized
fiber content. From the viscosity test , the optimum
temperature of impreg- nation tank is set between in 25 and
50℃. The prepolymer has at least 8 hr pot life in order to
let the fiber have enough time for processing. From the
results of SEM fracture-surface , of longiltudinal and cross-
section, the hybridized fiber have good wet-out. From the
above disscussion,the VE resin have excellent processing for
pultrusion. From the experiment results,the range of pulling
rate is set 20~70cm/min , and the optimum pulling rate is 40cm/
min. From the DSC and mechanical properties investigation,the
optimum die tem- perature and time is 120℃ and 1hr,
respectively. The dynamic mechanical properties increased with
the incre- assing of hybridized fiber content. The dynamic
storage modulus (E'') of adding rayon fiber is better than that
without of adding ,and the Tanδ（Tg) do not change due to
the hybridized fiber don''t have an effect on Tg.
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