DC 欄位 | 值 | 語言 |
dc.contributor.author | 林金福 | zh_TW |
dc.creator | 林金福 | zh_TW |
dc.date | 2002 | zh_TW |
dc.date.accessioned | 2006-07-25T10:42:14Z | - |
dc.date.accessioned | 2018-06-28T21:57:55Z | - |
dc.date.available | 2006-07-25T10:42:14Z | - |
dc.date.available | 2018-06-28T21:57:55Z | - |
dc.date.issued | 2002 | - |
dc.identifier | 902216E002021 | zh_TW |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/12403 | - |
dc.description.abstract | 本計畫第二年主要是合成㆒系列側接液晶短鏈(末端基分別為NO2, CN,及CF3) 的PPP 共軛高分子,探討其液晶相及發光性質。結果顯示以biphenyl tolane-based 的單體大部分具有寬廣範圍的液晶相,而部分聚合物在偏光顯微鏡鑑定㆘有nematic 相的存在。除了含NO2 取代基的高分子外,其餘聚
合體的主鏈和側鏈均有藕合現象,放射出400~450 nm 範圍的單㆒波峰螢光。聚合物在配向處理過polyimide 膜的配向實驗顯示,平行配向方向的螢光強度為垂直方向的4 倍,而側接的液晶分子則有平行排列於配向方向的現象。 | zh_TW |
dc.description.abstract | In the second year of this project, a series of
poly(p-phenylene) (PPP) derivatives were synthesized with each phenyl units attaching a short side chain composed of a flexible segment varying with lengths, a biphenyl tolane mesogenic moiety, and one of the following terminal groups: -NO2, -CN, and -CF3. The results indicate that most of the monomers with
such arranged side chains exhibited a wide range of mesophases, but only part of their polymers possessed a nematic phase observed by a polarized optical microscope. Except those terminated with nitro groups, other polymers have theirπ- electrons in main chain and side chains coupled together and showed only one photoluminescence peak appeared in a wavelength range of 400 ~ 450 nm. When the polymers with side chains were aligned by casting the solutions to a rub-aligned polyimide films, their
photoluminecent intensity in aligned direction was 4 times higher than that in transverse direction. IR analysis indicated that the attached mesogenic groups were preferentially oriented to the aligned direction. | en |
dc.format | application/pdf | zh_TW |
dc.format.extent | 356104 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | zh-TW | zh_TW |
dc.language.iso | zh_TW | - |
dc.publisher | 臺北市:國立臺灣大學材料科學與工程學研究所 | zh_TW |
dc.rights | 國立臺灣大學材料科學與工程學研究所 | zh_TW |
dc.title | PPV及PPP側接短鏈和液晶發光團之合成、結構和光電性質研究(2/3) | zh_TW |
dc.type | report | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/12403/1/902216E002021.pdf | - |
dc.coverage | 計畫年度:90;起迄日期:2001-08-01/2002-07-31 | zh_TW |
item.languageiso639-1 | zh_TW | - |
item.cerifentitytype | Publications | - |
item.fulltext | with fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_93fc | - |
item.openairetype | report | - |
item.grantfulltext | open | - |
顯示於: | 材料科學與工程學系
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