PC奈米複合材料之研究

A study of PC-Clay nanocomposite

呂聖賢(Sheng-Shian Liu)

指導教授 ： 廖義田

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2010年)

摘要

奈米科技是近幾年開發的新領域，結合高分子材料所形成的奈米複合材料是奈米材料發展應用的一個重要方向。本研究以活性自由基聚合反應來製備Clay奈米複合材料，利用自行合成的4-(N,N-Diethydithiocarbamylmethyl)benzyltrimethyl- ammonium改質劑，將蒙脫土（pk-802）改質，使蒙脫土達到剝離的狀態，再將聚碳酸酯（PC）加入蒙脫土，經過compounding injection moldy強度有提升的趨勢，並以XRD證明其結構，由微差掃描熱分析儀（DSC）可以發現抗拉來測定熱性質部分，加入5%Clay時在機械性質上有極佳的表現。
　　另外，本研究也針對polylactide及PC高分子分別形成奈米複合材料，經過compounding與compression molding，發現clay的增加，使PC及polyactide的伸張強度及Tg有極大之增加。
本研究亦設計添加不同比例的PMMA於PU及PC中，以溶液摻合法（solution blending）混合均勻，再探討其相容性行為。其次，添加不同比例的蒙脫土（pk-802）於高分子（PU及PC）中，以溶液摻合法（solution blending）混合均勻，在固定溫度下成膜，得到奈米複合材料，再探討其機械性質及熱性質。

關鍵字

奈米複合材料 ； 活性自由基 ； 蒙脫土 ； PC ； PU

並列摘要

In the study, PC nanocomposite are synthesized by ATRP. A new living free radical polymerization is used to exofoliate the Montmorillonite (PK802).The Montmorillonite are treated by 4-(N,N-Diethyl dithiocarbamyl methyl)benzyltrimethylammonium bromide. The Montmorillonite are exofolided by X-ray measurement(XRD). Finally, the polyacrylic acid clay nanocomposite are mixed with PC by twin-crew extruder. They are molded into test specimens by compression molding. It is found the tensile strengths increase almost twice of its original value when the clay content is 5 wt％ of the composites,the thermal properties increase significantly after adding the clay. The thermal properties of PC nanocomposite were investigated by DSC measurement.
The second part, PMMA are mixed with PU、PC by solution blending,and PMMA contents ranging from 3% to 10%.Their compatibility behavior are investigated . Then,nanocomposites of PU-Clay、PC-Clay are studied in this research. , the polymethyl methacrylate clay nanocomposite are mixed with PU and PC by solution blending. The clay contents ranging from 1% to 10%. The tensile strength and glass transition temperature increase significantly after adding the clay.

並列關鍵字

Nanocomposites ； Living free radical ； Montmorillonite ； PC ； PU

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