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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 童世煌(Shih-Huang Tung) | |
dc.contributor.author | Yen-Hsiang Chang | en |
dc.contributor.author | 張硯翔 | zh_TW |
dc.date.accessioned | 2021-06-08T00:08:14Z | - |
dc.date.copyright | 2013-08-20 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-08-12 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/17351 | - |
dc.description.abstract | In this study, we used random copolymers to modify the surface of substrates and the modified surfaces were used to control the microdomain orientation of block copolymer thin films. We synthesized a series of random copolymers PS-r-P4VP by nitroxide-mediated controlled radical polymerization and the random copolymers were coated on substrates to form stable cross-linked mats where PS-b-P4VP and PS-b-PMMA thin films were spun-cast. The interfacial interactions between the blocks and the mats can be tuned by adjusting the compositions of PS-r-P4VPs and the optimal conditions for inducing perpendicular microdomains were investigated. Previous studies have shown that PS-r-PMMA mats can efficiently induce the perpendicular microdomains of PS-b-PMMA thin films due to the balance of the interfacial interactions. Here, we found that on PS-r-P4VP mats, the perpendicular microdomains of PS-b-P4VP can be induced only for films with small thickness, ~ one natural period of the block copolymer. Instead, PS-r-P4VP mats can be used to effectively control the orientation of PS-b-PMMA thin films. We attribute these results to the much higher surface tension of P4VP compared to that of PMMA, which greatly prevents the exposure of P4VP to air so that parallel microdomains are preferred on the free surface of the films. We also studied the effects of molecular weight of PS-b-P4VP and PS-b-PMMA on the orientation control and found that high molecular weights are required to produce perpendicular microdomains using the methods of surface modification. This can be well explained by the theory of chain end effect and nematic effect. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T00:08:14Z (GMT). No. of bitstreams: 1 ntu-102-R00549014-1.pdf: 33112484 bytes, checksum: b2a20b620c87f296a26473af52863b49 (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | 口試委員審定書 i
誌謝 ii Abstract iii 中文摘要 iv Table of contents v Figure Captions vii Table Captions xv Chapter 1 1 1.1 Introduction to Block Copolymer 2 1.2 Introduction of block copolymer films 5 1.3 Surface modification for perpendicular structures 8 Chapter 2 21 2.1 Materials 21 2.2 Instrument 24 2.3 Experimental approach 27 Chapter 3 30 3.1 Symmetric PS-b-P4VP (PS 20 kg/mol, P4VP 17 kg/mol) 30 3.2 Symmetric PS-b-P4VP (PS 26 kg/mol, P4VP 29.5 kg/mol) 33 3.3 Symmetric PS-b-PMMA (PS 37 kg/mol, PMMA 37 kg/mol) 38 3.4 Asymmetric PS-b-PMMA (PS 27 kg/mol, PMMA 10 kg/mol) 45 3.5 Asymmetric PS-b-PMMA (PS 55 kg/mol, PMMA 22 kg/mol) 47 Chapter 4 87 Conclusion 87 Reference 89 Autobiography 92 | |
dc.language.iso | en | |
dc.title | 利用無規則共聚物表面改質調控嵌段共聚物薄膜之方向性 | zh_TW |
dc.title | Control over the Orientation of Block Copolymer Thin Films Using Cross-Linked Random Copolymers as Surface Modifiers | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 黃慶怡(Ching-I Huang),戴子安(Chi-An Dai) | |
dc.subject.keyword | 嵌段式共聚物,無規則共聚物,表面改質,薄膜,垂直結構, | zh_TW |
dc.subject.keyword | block copolymer,random copolymer,surface modification,thin films,vertical structures, | en |
dc.relation.page | 92 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2013-08-12 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 高分子科學與工程學研究所 | zh_TW |
顯示於系所單位: | 高分子科學與工程學研究所 |
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