Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/3331
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dc.contributor.advisorWu, Jeng-Yueen_US
dc.contributor.advisor吳震裕zh_TW
dc.contributor.author蔡茜茜zh_TW
dc.contributor.authorTsia, Chan-Chanen_US
dc.date2001zh_TW
dc.date.accessioned2014-06-06T05:31:45Z-
dc.date.available2014-06-06T05:31:45Z-
dc.identifier.urihttp://hdl.handle.net/11455/3331-
dc.description.abstractThe purpose of this thesis was to investigate the effect of montmorillonite content, the concentration of TEMPO and reaction time on the synthesis of PS/MMT nanocomposites by in situ living free radical polymerization at 123℃. Polymerization of styrene in presence of montomorillonite(the montomorillonite's dosage: 1.55 and 3.10 wt%) containing living free radical initiator for 8 hours gave the chemical grafting of PS at 2.28 ~ 2.74 g/1gMMT without adding TEMPO and at 1.08 ~ 1.21 g/1gMMT with 0.005M TEMPO addition. The presence of TEMPO exhibited the linear dependence of versus conversion and showed the “living character” of the polymerization. The polydispersity index of 1.0 ~ 1.2 and the number-average molecular weight (Mn) of 50,000~ 90,000 polymer was obtained for 8-hour reaction period and XRD data showed a weak diffraction between 2.9 and 3.5 nm indicating trace amount of montomorillonite not exfoliated. Without the addition of TEMPO, the polydispersity is between 1.3 and 1.5 and the Mn of 170,000 ~ 230,000 could be obtained for 8-hour reaction period. The d-spacing greater than 4.4 nm after a reaction time of 6 hours was observed. In summary, we have demonstrated that PS/MMT nanocomposites can be directly polymerized via adsorbed living free radical initiator. Diversifying molecular weight and polydispersity of polystyrene grafted on the montomorillonite surface can be prepared by varying the external concentration of TEMPO.en_US
dc.description.abstract本研究利用蒙脫土/苯乙烯之在位活性自由基聚合 (in-Situ Living Free Radical Polymerization)的方式,在蒙脫土表面吸附活性自由基起始劑,探討在123℃進行聚合反應不同TEMPO外加濃度及蒙脫土含量對反應時間之變化,製備聚苯乙烯/蒙脫土奈米複合材料。 含活性自由基之蒙脫土(蒙脫土含量為1.55 wt%及3.10 wt%) 的苯乙烯聚合,在不外加TEMPO下,則反應8小時後,蒙脫土表 面接枝PS量為2.28∼2.74 g PS/1g MMT;若外加0.005M TEMPO ,則反應8小時之蒙脫土表面接枝PS量為1.08∼1.21g PS/1g MMT 。有外加TEMPO情形下, 對轉化率為線性關係,具活性自由 基聚合的特徵,反應8小時分子量Mn約50,000∼90,000,聚分散 度較窄約在1.0∼1.2,且大部分蒙脫土之層間距大於4.4 nm。若不 外加TEMPO,則反應8小時後,分子量Mn約170,000∼230,000, 聚分散度較寬約1.3∼1.5,於反應6小時後層間距已大於4.4 nm。 研究結果顯示,藉外加TEMPO濃度變化可製備不同分子量與聚分 散度之PS接枝於蒙脫土表面形成PS/MMT奈米複合材料。zh_TW
dc.description.tableofcontents中文摘要……………………………………………………………….I 英文摘要………………………………………………………………II 誌謝…………………………………………………………………..III 目錄…………………………………………………………………..IV 表目錄…………………………………………………………..……Ⅶ 圖目錄…………………………………………………………..……Ⅷ 一、 緒論……………………………………………………………...1 1.1 前言…………………………………………………………1 1.2 研究動機與目的……………………………………………7 1.3 研究方向……………………………………………………9 二、 文獻回顧與研究方法….………………………………………10 2.1 PS/Clay相關文獻…..……………………………………..10 2.2 Clay表面接枝PS相關文獻...……………………………15 2.3 活性自由基聚合PS相關文獻………………….………..19 2.3.1 活性自由基聚合原理…………………………………19 2.3.2 非活性自由基聚合動力學…………………………....25 2.3.3 活性自由基聚合動力學………………………………28 2.3.4 苯乙烯熱聚合反應……………………..……………..35 2.3.5 在TEMPO存在下之苯乙烯熱聚合反應……………40 2.4 Clay表面進行活性自由基聚合接枝PS相關文獻……..52 2.5 研究方法與流程………………………………………….54 三、 實驗………………………………………………….…………57 3.1 實驗材料………………………………………………….57 3.2 實驗儀器………………………………………………….59 3.3 實驗步驟………………………………………………….61 四、 結果與討論………………………………………….…………65 4.1 界面劑單體(VBDDAC)的合成……………………………..65 4.1.1 界面劑單體(VBDDAC)之結構鑑定…………………65 4.1.2 界面劑單體(VBDDAC)之物理性質測定……………67 4.2蒙脫土表面改質……..………………………………………..68 4.2.1 VBDDAC/蒙脫土吸附平衡…..………………..…….…68 4.2.2 蒙脫土吸附活性自由基起始劑……………..……….…71 4.3 PS/MMT奈米複合材料合成與性質分析…………..………..72 4.3.1. 改變TEMPO濃度之苯乙烯123℃熱聚合…………....73 4.3.2. 含活性自由基之蒙脫土(1.55 wt%)於外加不同 濃度TEMPO之苯乙烯聚合………………….……….75 4.3.3. 含活性自由基之蒙脫土(3.10 wt%)於外加不同 濃度TEMPO之苯乙烯聚合………………………….79 4.3.4. 吸附單層VBDDAC之蒙脫土於123℃苯乙烯塊狀 聚合…………………………………………………….84 4.3.5. 總比較………………………………………………….85 五、 結論…………………………………………………………….89 六、參考文獻…………………………………………………..……91zh_TW
dc.language.isoen_USzh_TW
dc.publisher化學工程學系zh_TW
dc.subject聚苯乙烯/蒙脫土奈米複合材料zh_TW
dc.subjectPS/MMT nanocompositeen_US
dc.subject在位活性自由基聚合zh_TW
dc.subject蒙脫土zh_TW
dc.subject活性自由基起始劑zh_TW
dc.subject接枝zh_TW
dc.subjectin-Situ Living Free Radical Polymerizationen_US
dc.subjectmontmorilloniteen_US
dc.subjectLiving Free Radical Initiatoren_US
dc.subjectgraften_US
dc.titleThe Study of Styrene Polymerization in the Presence of Montmorillonite Containing Living Free Radical Initiatoren_US
dc.title含活性自由基之蒙脫土與苯乙烯聚合研究zh_TW
dc.typeThesis and Dissertationzh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.grantfulltextnone-
Appears in Collections:化學工程學系所
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