空間侷限聚合反應研究

本研究的目的在結合觸媒設計、聚合反應，與中孔洞無機材載體技術，來達成兩種或多種聚合物有效的分子層次混掺。利用Metallocene觸媒能聚合出HDPE(高密度聚乙烯)以及Nickel-diimine(DMN)觸媒能聚合出VLDPE(very low-density polyethylene)(超低密度聚乙烯)的特性，將兩種聚合反應所使用的觸媒，同時載入無機載體中，形成一新型觸媒，在空間侷限聚合過程中達到分子混掺的效果，改善傳統分別將兩種聚合物聚合後再進行混摻之製程。將欲摻合的聚合物之觸媒載入屬於奈米層級孔洞中經由不同觸媒穿入孔洞材料載體之製備及甲基鋁氧烷(MAO) 的活化控制，進行聚合反應讓聚合物從奈米孔洞中進行聚合反應，也同時進行混摻反應。觀察聚乙烯在侷限空間聚合反應效果。反應結果證明觸媒在聚合反應時受到規則性孔洞材料的影響可提高聚合物的結晶度。而VLDPE(超低密度聚乙烯)之polymer chain受到空間侷限在孔洞中其branch%略微減少。經由DSC及NMR的相互佐證侷限空間聚合反應可達到兩種聚合物有效的混摻效果。

關鍵字

支鏈分佈；觸煤；聚合反應；中孔洞

並列摘要

This research combines catalyst design, polymerization inside the mesoporous material to reach two kinds or many kinds of polymer in molecule level is blend effectively. Utilizing the metallocene catalyst to get the HDPE (high density polyethylene) and Nickel-diimine (DMN) catalyst to get the VLDPE (very low density polyethylene), loaded the two kinds of catalyst of catalyst into mesoporous to form a new-type and then the polymerization are carried inside the limiting space. In this way try to improve tradition of two different kinds of polymers. The catalyst are inserted into the mesoporous and activated by MAO. The polymerization is carried inside the nanosize of the mesoporous. The different kinds of reaction conditions are studied inside the limiting space of mesoporous. The results show that the polymerization is influenced by regular hole in mesoporous and the degree of crystallinity of the polymer is increasing. And its branch obviously reduces in polymer chain of VLDPE due to the confining space. The effective of two kinds of polymer blending are by DSC and NMR spectra.

並列關鍵字

catalyst ； mesoporous ； branch ； polymerization

參考文獻

1. D.S.Breslow and N.R.Newburg, J.Am.Chem.Soc., 79, 5072, 1957,

3. Jolly and D.S Marynik, J.AM. Chem.Soc., 111, 7968, 1989,

4. Bestian and Clauss, Angew.ChInt.Ed.Engl., 2, 704, 1963

6. Mckinney, J.Chem.Soc.,Chem.Commun., 490, 1980

10.Henrici -Olive and S.Olive, J.Organomet. Chem., 1681, 1969

國際替代計量

空間侷限聚合反應研究

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