利用物理發泡法製備聚(甲基丙烯酸丁酯-苯乙烯)共聚合物-黏土奈米複合發泡材料與其性質研究

Preparation and Property Studies of Poly(butyl methacrylate-co-styrene)-Clay Nanocomposite Foams via Physical Foaming Process

顏哲偉(Che-Wei Yen)

指導教授 ： 葉瑞銘

中原大學/理學院/化學系/碩士(2006年)

https://doi.org/10.6840/cycu200600431

摘要

摘要
本論文的探討重點主要在於導入有機改質型黏土作為晶核劑於高分子共聚物(Copolymer)中，藉以降低物理發泡法(Physical Foaming Process )之泡體體積，並同時提升整體材料之發泡密度。藉由大幅空氣的導入，來調整所生成之奈米複合發泡材料之物理性質。
首先，利用有機改質之蒙脫土(Montmorillonite)導入甲基丙基酸丁酯及苯乙烯之單體混合液，然後進行總體聚合反應(Bulk Polymerization)，並進一步進行物理發泡。所生成之奈米複合發泡材料以穿透式電子顯微鏡觀察黏土在高分子基材之分散情形，以廣角X-ray繞射儀來觀察黏土之層間距，以掃描式電子顯微鏡來觀察發泡體之表面型態，並計算泡體之平均大小及密度。
在性質探討方面，主要是研究材料之熱性質及機械性質。在熱性質的解析方面，以熱重分析儀探討材料之熱穩定性，以微差掃描式熱分析儀觀察材料之軟化點，再以熱傳導係數分析儀量測材料之熱傳導係數，最後以動態機械分析儀分析變溫狀態下之儲存模數之變化。

關鍵字

奈米複合材料 ； 奈米複合發泡材料 ； 物理發泡 ； 共聚物

並列摘要

Abstract
In this study, the organophilic clay used as intercalation agent was prepared by cation exchange method, which is a reaction occurred between the sodium cation of MMT clay and quaternary alkylammonium ions of hexadecyltrimethylammonium bromide. As a typical procedure for the preparation of nanocomposite systems with 0.5, 1.0, 3.0 wt-% clay, an appropriate amount of organophilic clay was first suspended in BMA-St monomer to proceed bulk polymerization. At the end of polymerization, the PBS/clay nanocomposite materials were thus obtained. Subsequently, a series of corresponding nanocomposite foamed materials were prepared by “ Physical Foaming Process ”. The foamed characterization on the structure of the nanocomposite and nanocomposite foams was evaluated by XRD measurements to show changes in the d spacing of the clay and by TEM to image the indivdual clay layers. The cell size & cell density was observed by SEM. TGA、DSC and DMA were employed to investigate the thermal stability of as-prepared specimens. Thermal transport parameters such as the thermal conductivity, thermal diffusively and specific heat were measured by a HOT DISK analyzer under room temperature.

並列關鍵字

Nanocomposite foams ； Physical foaming ； copolymer ； Nanocomposite

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