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題名 | 塑膠射出成型之材料參數對縫合強度的最佳化設計=Optimal Design on Weld-Line Strength by Material Parameters of Injection Molding Plastics |
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作者 | 陳榮盛; 黃富勇; 黃登淵; Chen, R. S.; Huang, F. Y.; Huang, D. Y.; |
期刊 | 高雄科學技術學院學報 |
出版日期 | 19981200 |
卷期 | 28 1998.12[民87.12] |
頁次 | 頁97-113 |
分類號 | 440.34 |
語文 | chi |
關鍵詞 | 高分子材料性質; 縫合線; 擴散; 癒合; 最佳化; Polymer properties; Weld-line; Molecular chains self-diffusion; Diffusion rate; |
中文摘要 | 本文以分子鏈自我擴散模型分析分子在縫合線界面的行為,並探討高分子材料性 質對縫合線強度的影響。再者,結合最佳化理論進而找出最佳材料。根據此模型,可知影響 縫合線鏈結度之關鍵物性為高分子材料之擴散率。因此將擴散率視為最佳化程式的目標函數 ,而材料參數為目標函數的設計變數。最佳化結果發現影響縫合線界面分子擴散率最明顯的 材料性質依次為黏度、分子量。此外,玻璃轉換溫度 Tg 雖未直接影響分子擴散率,仍應為 關鍵因素。 在 Tg 低時,若熔膠溫度升高 1 %,將可提升擴散率達 36 %。因此,在機械 性質允許的範圍內,儘量選擇低黏度、與玻璃轉換溫度低之材料。最後,本文設計一組可提 升界面分子擴散率,促使癒合縫合線最佳化之材料性質組合,以供參考。 |
英文摘要 | This paper studied the effects of polymer properties on the weld-line strength through the molecular behavior on the weld-line interface. By combining the optimization theory with a molecular chains self-diffusion model, the optimal plastics were found. The diffusion rate is taken as an objective function in the optimal design, and the material parameters as designing variables of the objective function. The result showed that the material properties which have significant effects on the molecular diffusion rate on the weld-line interface are viscosity and molecular weight. Besides, the glass transition temperature Tg is still a major factor, although it does not give direct effect on the molecular diffusion rate on the weld interface. For polymer with low Tg, the diffusion rate on the weld interface could be increased by 36% when the melt temperature rose by 1%, but not for the polymer with high Tg. Therefore, it would be better for the weld-line strength to select polymer of low viscosity, small molecular weight and low glass transition temperature. This paper also suggests a set of material properties that could contribute to the enhancement of interface molecular diffusion rate and the optimization of bealing on the weld interface. |
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