| Summary: | 碩士 === 國立虎尾科技大學 === 機械與電腦輔助工程系碩士班 === 104 === Acrylonitrile-styrene-acrylate terpolymer (ASA) material is used widely because of good properties in high impact resistance, good mechanical strength, and good weather resistance. Application of Taguchi-based Gray relational analysis for studying on mechanical properties in different weight percent of the glass fiber hybrid/ ASA by injection molding process . After forming the different levels of weight percent of the glass fiber hybrid / ASA morphology SEM, OM , mechanical properties Hardness, Tensile test, compression test, structure analysis EDS, XRD, MI, TGA, DSC, FTIR.
Experimental results show that the tensile strength of the material Taguchi process optimization combination A3B1C1D1 and increase the percentage of fiber strength by linear lift about 42%; a combination of process optimization in terms of hardness and compressive stress on A3B2C2D2 strength 59% increase the present study after the completion of the Taguchi method to optimize the value of a single product, the import of gray relational analysis and calculate the best quality of multiple process parameters tensile strength and hardness of the composite is A3B1C3D2, strengthen its tensile strength compared to the raw material about 39.6%; hardness of about 44.8% partial reinforcement, fracture surface was observed using SEM showed that the material in the case by the addition of glass fibers turn brittle and tough, but also from its surface observation toughness and brittle tissue characteristics and uses EDS semi-quantitative elemental analysis of fracture surface, showing GF / ASA have produced mixed Si element, in addition to XRD results showed that ASA non-crystalline material, and increase the fiber content does not affect its ASA and its crystalline structure strengthened its mechanical properties. MI showed that the material after the addition of GF liquidity linear downward trend; DSC showed ASA / GF composites, the thermal temperature: Tg, Tc, Tm, but the material is non-crystalline solid material Tm obvious; TGA results display ASA / GF material is heated to about 350 ℃ start gasification; weight loss of about 42-52% at 420-430 ℃; completely vaporized and its remaining weight was observed at 450 ℃ percentage of 1%, 13.8% respectively, 20.29% with a high temperature ashing another positive test results and the actual material obtained glass content, in addition to this study, FTIR analysis showed and proved the present composite substrates is acrylonitrile - styrene - acrylate copolymer, and added glass fiber does not affect the characteristic peak positions of functional groups.
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