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題名 | 利用有機硼合成四甲基-戊烯之官能性共聚物= |
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作者 | 李季燃; 楊連城; 鄭懷明; 江彰吉; 賴君義; |
期刊 | 材料科學 |
出版日期 | 19950300 |
卷期 | 27:1 1995.03[民84.03] |
頁次 | 頁1-9 |
分類號 | 467.42 |
語文 | chi |
關鍵詞 | 齊格勒-那達催化劑; 四甲基-戊烯之官能性共聚物; Ziegler-natta catalyst; Functionalized copolymers of 4-methyl-1-pentene; |
中文摘要 | 本論文探討使用齊格勒一那達催化劑(Ziegler-Natta catalyst)合成四甲基 一戊烯(4-methyl-1-pentene)與五己烯一醇(5-hexen-1-01)之官能化的共聚物。直接聚 合有官能基的單體,如羥基,則會破壞催化劑之活性,可以藉著先聚合烯基硼 (alkenyl borane)和四甲基一戊烯的共聚物,再將此含硼共聚物轉換成含羥基的官 能性高分子,以得到所需之產物。而且可以利用含有機硼之聚四甲基一戊烯共聚 物形成自由基的起始劑(free radical initiator)來進行接枝聚合反應(graft polymerization),使用此方法很容易就可以將聚甲基丙烯酸甲酯[poly(methyl mathacrylate);PMMA]接枝到高分子主鏈上。從傅立葉紅外線光譜(FTIR)和氫原子 核磁共振光譜(�禧NMR)可以確定此兩種共聚物的結構。 藉著控制單體進料比之大小,可以合成各種組成比不同的產物,相對的,這些共 聚物所表現之物理和化學性質,也會顯示出不同程度的變化。本文就所合成之共 聚物的產率、分子量、玻璃轉換點(Tg)及對熱的穩定性進行探討和比較。共聚物 成膜後對氣體滲透性(permeability)及選擇性(selectivity)也進行研究。由結果,明白 的顯示當單體的進料比為一比一時,所形成的薄膜會有較好的氧、氮選擇,性(約 為3.4)及較高的氧氣滲透性(PO��=90 barrer)。 |
英文摘要 | The functionalized copolymers of 4-methyl-1-pentene and 5-hexen-1-01 were synthesized by using Ziegler-Natta catalyst. The direct polymerization of the functional monomer such as hydroxygroup, the catalyst will be poisioned and lose its activity. However, the copolymerizing an alkenylborane monomer and 4-methyl-1-pentene, and then converting the resulting 4-methyl-1-pentene boranecopolymer to the corresponding hydroxy containing polymer can be achieved. It is also easy to graftpoly (methyl methacrylate) on the copolymer chain by using borane containing poly (4-methyl-1-pentene).From the spectroscopic analyses of FTIR and HNMR, the structures of the copolymers can bedetermined. By varying the monomers feed ratio, the different compositions copolymers can be obtained. The physical and chemical properties, such as yield, molecular weight, glass tansition point (Tg) and thermal stability of these copolymers are studied. The gas permeability and selectivity of the copolymersfilms are also studied. The results show that the membrane prepared from the copolymer of feedratio of 1:1 has a good O��/N �� selectivity and a high oxygen permeability. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。