茂金屬聚乙烯/蒙脫土奈米複合發泡材之製備

Preparation of metallocene polyethylene/clay Foam Nanocomposites

林俊良(Jun-Liang Lin)

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(2009年)

摘要

本研究使用相容劑茂金屬聚乙烯接枝馬來酸酐(mPE-g-MA)，先改質茂金屬聚乙烯極性，使表面具有COOH基，進而與蒙脫土表面的OH基產生化學鍵結，另外，配方中添加偶氮二甲醯胺(AC發泡劑)及過氧化二異丙苯(DCP交聯劑)，並以熔融插層法製備茂金屬聚乙烯/蒙脫土奈米複合發泡材料。此外，藉由萬能拉力機、DSC、SEM進行機械性質與尺寸熱穩定的探討。由研究結果顯示，當Clay添加量在5 PHR時，硬度約有32%的提昇，延伸率可提昇1倍，剝離強度提昇約64%，撕裂強度提昇約78%，壓縮歪改善率約40%，熱收縮改善率高達四倍。

關鍵字

蒙脫土 ； 茂金屬聚乙烯 ； 化學交聯 ； 發泡

並列摘要

This study is to utilize nano-Clay (with –OH group) to improve the performances of metathesized Metallocene Polyethylene (with –COOH group). As Metallocene Polyethylene is a non-polarized polymer, maleic anhydride grafted metallocene polyethylene (mPE-g-MA) is used as coupling agent to mix with metallocene polyethylene to metathesize the –COOH functional group on the surface, and to be able to react and form chemical bonds with the –OH group on the nano-Clay. Azodicarbonamide (AC blowing agent) and peroxide (DCP cross-linking agent) added in the formula can then be melt-intercalated to form nano- Metallocene Polyethylene / Clay foam composite. Mechanical properties and heat dimensional stability of this nano-composite with 5PHR dosage of nano-Clay have been tested and verified with Instron Tensile machine, DSC and SEM, and the results show around 32% increase in hardness, almost double in elongation performance, 64% increase in split tear property, 78% increase in tear strength, 40% improvement in compression set, nearly 75% decrease in heat shrinkage

並列關鍵字

metallocene polyethylene ； clay ； chemical cross-linking ； foaming

參考文獻

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