| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 鄭孟勳 | zh_TW |
| DC.creator | Meng-Hsun Cheng | en_US |
| dc.date.accessioned | 2000-6-28T07:39:07Z | |
| dc.date.available | 2000-6-28T07:39:07Z | |
| dc.date.issued | 2000 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=87621016 | |
| dc.contributor.department | 化學學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | In our studies, the physical properties of poly(propylene-co-norbornene) COC copolymers were investigated which were synthesized using Metallocene catalyst (rac-bis(Ind)2EtZrCl2) and MAO as a co-catalyst. The crystalline and non-crystalline copolymers could be synthesized by different copolymerization procedures. First, the activity of copolymer dramatically decreases with increasing feeding norbornene amount, however, the activity increases with increasing copolymerization temperature. The glass transition temperature of copolymer is affected by two factors: the norbornene content in copolymer and the isotacticity of polypropylene. The microstructure of copolymer is mainly constituent with isolated and alternating norbornene sequence, which is not varied much with increasing norbornene content. Norbornene diades or longer norbornene block sequence probably exists in copolymer which is polymerized under higher reaction temperature. The equilibrium melting point is about 163oC which is determined by Hoffman-Weeks plot. No matter in isothermal or non-isothermal crystallization kinetics, the crystallization rate of isotactic polypropylene homopolymer is higher than copolymer, and the more norbornene content the lower crystallization rate will be obtained. Regime transition occurs in ipp homopolymer and copolymers, and the change in slope approaches about twofold. The fold surface energy（σe） and the work of chain folding（q） of copolymer is about 4-5 folds higher than homopolymer. Finally, the crystal form of polypropylene is stillα-form which is not varied with introducing norbornene unit in polymer chain or faster cooling rate. | en_US |
| DC.subject | 原冰烯 | zh_TW |
| DC.subject | 丙烯 | zh_TW |
| DC.subject | 結晶動力學 | zh_TW |
| DC.subject | 結晶 | zh_TW |
| DC.subject | 結晶型 | zh_TW |
| DC.subject | 微結構 | zh_TW |
| DC.subject | norbornene | en_US |
| DC.subject | propylene | en_US |
| DC.subject | crystallization kinetics | en_US |
| DC.subject | crystal | en_US |
| DC.subject | crystal form | en_US |
| DC.subject | mircrostructure | en_US |
| DC.title | 以有機茂金屬觸媒合成丙烯-原冰烯之COC共聚物及其物性探討 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Physical properties of Poly(propylene-co-norbornene) Copolymer using Metallocene Catalyst | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |