ABS/PMMA合膠加工性質之研究

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题名:	ABS/PMMA合膠加工性質之研究 The study for Mechanical Properties of ABS/PMMA blend converting
作者:	張洲銘
贡献者:	材料科學與奈米科技研究所
关键词:	ABS PMMA 合膠射出成型 Blending Injection Model
日期:	2006
上传时间:	2014-06-16 13:29:49 (UTC+8)
摘要:	合膠〈Blending〉指將兩種或兩種以上，具有不同化學構造的高分子化合物，依不同的比例，以分子的型態，利用物理或化學的方式予以摻混，而獲得具有特性的材料。聚合物合膠系統，是一個填充複合體系統，具有複雜多層次非均勻內部結構，因此如何在加工成型過程中，精密控制這些多層次內部結構，及充分發揮聚合物及其合膠、填充材料的性能潛力，是當前高分子加工研究中的重要課題。ABS與PMMA均為日常生活中常見的工程塑膠，透明的PMMA，具有優越的強度與硬度，而ABS 塑膠的韌性與加工性良好。此研究推測可藉由聚摻合方式，獲得具有兩者特性的ABS/PMMA合膠。研究發現ABS/PMMA合膠，其抗張強度跟PMMA的含量成正比，韌性跟PMMA含量成反比。另外，也證明了PMMA可以提升合膠的表面硬度。在射出成型的加工中，熔融掺混膠粒填充比分別混合塑膠粒填充方式，更可以在加工熔融成型、流動與勻化中取得優勢，可以在成形固化過程中取得較佳且穩定的品質優勢。但對於小批量或少量多樣化的生產模式，在成本上則有不利的因素。 “Blending” is a specialized polymer acquired by mixing two or more than two high polymer compounds in their molecular phases; the way to mix different compounds may be through either physical or chemical manners. The blending system is an injected multi-compounds system, which has complicated and inconsistent layers. Thus, how to precisely control the various layers throughout the forming process and to expand the potential function from different polymers would be the most important issues of high polymer forming study. ABS and PMMA are the two most common engineering plastics in daily lives. Clear PMMA is well known for its strength and degree of hardness; while ABS has nice impact strength and malleability. Presumably through mixing the above two polymers, we should be able to acquire a “blending” which has the merits of both materials. Our results indeed support that the strength of ABS/PMMA blending the amount of PMMA mixed, while an opposite trend is observed for the tenacity, the blending also shows improved surface strength in presence of PMMA. During injection molding, if material is pre-melted and grounded, it wills has better performance on forming and flowing compared to the material without pre-melting. Further, the pre-melted material will be better homogenized than those without melting pre-treatment. To use the pre-melted material would enable us to have better and consistent quality, however, the pre-melted material will not be an option for producing smaller lots with high varieties due to fact that the pre-melting process would consume too much labor and costs.
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