| Summary: | 碩士 === 中國文化大學 === 材料科學與奈米科技研究所 === 96 === This research presents a proprietary process develop to manufacture pultruded glass fiber reinforced vinyl ester nanocomposites. First, we discussed the synthetic properties and processing probilities of mixing of nano inorganic fillers and vinyl ester（VE）, and dicussed cure kinetics to collocate derive of theory second. Finally, to discuss micro structure, mechanical, physical, thermal and electrical properties of pultruded glass fiber reinforced vinyl ester nanocomposites.
The result of experiment, it was found that 1~3 phr filler contents are suitable for pultrusion. The stabilization of viscosity of wet-out bath was set at 25℃. From gel test and FTIR analysis, VE had good reactive. With DSC analysis, VE had cured at 140℃, and calculused activation of energy Ea was 69kJ/mol, autocatalytic parament m was 0.645 and reactive series n was 1.477 by multiple of Matlab 7.0.1.
In aspect of micro structure of pultruded nanocomposites, it show elements of nano inorganic fillers in composites in XRD, it can observe better wet-out and combination of fiber, resin and nano inorganic fillers in SEM, lower surface roughness in AFM and not only had no inflection of function group C＝C in VE with adding nano inorganic fillers but also disperse in fiber and resin in Raman spectrum indentification.
In aspect of the mechanical properties, there had best flexural strength, flexural modulus, impact strength and hardness with 75.568vol% of glass fiber content and pulling rate at 40cm/min. It was found that 2phr nano Al2O3 contents and 1phr nano mica contents are the best, and 110℃, 3hr for postcure.In aspect of the physical properties, the density of pultruded nanocomposites increased with increasing nano inorganic filler contents, the void content decreased with increasing nano inorganic filler content. In aspect of the thermal properties, the weight loss of pultruded nanocomposites decreased with increasing nano inorganic filler contents, the thermal degraded temperature increased with increasing nano inorganic filler contents. It was found that 3phr nano Al2O3 contents are the best. Its thermal degraded temperature was 460.3℃, increased 11.5%. Therefore, It was found that 2phr nano Al2O3 contents are the best for storage modulus and tan δ, and 110℃, 3hr for postcure. Finally, In aspect of the electrical properties, It was found that 3phr nano Al2O3 contents are the best absorption and shielding effectiveness for electromagnetic absorption and shielding test.
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