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姓名 翁啟洋(Chi-Yang Weng)  查詢紙本館藏   畢業系所 化學工程與材料工程學系
論文名稱 分散聚合法製備均一粒徑聚苯乙烯微米球
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摘要(中) 本研究以分散聚合法製備均一粒徑聚苯乙烯(PS)微米球,並對反應條件溶劑、反應溫度、起始劑偶氮二異丁腈(AIBN)用量、穩定劑聚乙烯基吡咯烷酮(PVP)用量進行探討。
以異丙醇為反應溶劑時,因為異丙醇和穩定劑PVP相溶性不佳,核與核之間劇烈碰撞,造成PS微球之粒徑均一度差。而以乙醇或甲醇為反應溶劑時則能成功製備均一粒徑PS微米球。
PS微米球之平均粒徑,隨反應溫度、起始劑AIBN用量增加而大;隨穩定劑PVP用量增加而變小。以乙醇和甲醇為反應溶劑時,所能製備得最大粒徑分別為2.52μm和2.92μm。此外,在乙醇或甲醇溶劑下可以藉由微量(≤5%)添加共溶劑(甲苯或丁酮)來增加PS微米球粒徑。這是因為共溶劑可以增加臨界鏈長(Critical chain length)進而增加PS微球粒徑。
摘要(英) The preparation conditions , solvents, reaction temperature, the amount of initiator 2,2′Azobisisobutyronitrile(AIBN) and stabilizer Polyvinylpyrrolidone(PVP),of monodisperse polystyrene (PS) microspheres by dispersion polymerization were
investigated.
When isopropyl alcohol (IPA) was used as reaction solvent, the compatibility between IPA and PVP was poor. The nuclei collided intensely. So the particle size of
PS microspheres was not uniform. On the other hands, monodisperse PS particle was obtained by using ethanol (EtOH) or methanol (MeOH) as solvents.
PS particle size was increased with increasing reaction temperature and amount of AIBN and with decreasing amount of PVP. The maximum size of monodispersemicrospheres prepared by EtOH and MOH were 2.52μm and 2.92μm, respectively. In
addition, the PS particle sizes were increased by adding few amount (≤5%) of co-solvent (toluene or methyl ethyl ketone) in EtOH or MeOH solvents, respectively.It was considered that co-solvent was able to increase the critical chain length of PS to increase PS particle size.
關鍵字(中) ★ 分散聚合法
★ 聚苯乙烯微球
★ 單分散性
關鍵字(英) ★ Dispersion polymerization
★ Polystyrene microsphere
★ Monodisperse
論文目次 中文摘要.................................................I
英文摘要................................................II
目錄..................................................III
表目錄..................................................V
圖目錄................................................VII
第一章 緒論..............................................1
1-1 均一粒徑高分子球製備方法..............................1
1-2. 分散聚合法機制......................................2
1-3. 分散聚合法文獻回顧..................................3
1-4.研究目的與動機.......................................5
第二章 實驗..............................................8
2-1. 實驗藥品............................................8
2-2. 實驗儀器...........................................10
2-3. 實驗方法...........................................11
2-3-1. 單體精餾.........................................11
2-3-2. 製備均一粒徑苯乙烯微米球..........................11
2-4. 高分子微米球的物性測試..............................13
2-4-1. 掃描式電子顯微鏡(SEM) ...........................13
2-4-2. 高分子微米球粒徑分布分析..........................13
第三章 結果與討論.......................................14
3-1. 異丙醇溶劑製備PS 微米球之研究.......................14
3-1-1. 反應溫度對PS 微米球之影響.........................15
3-1-2. 共溶劑對PS 微米球之影響...........................16
(a). 甲苯/異丙醇共溶劑對PS 微米球之影響...................16
(b). 丁酮/異丙醇共溶劑對PS 微米球之影響...................18
3-1-3. 醇類溶劑對PS 微米球之影響.........................19
3-2. 乙醇溶劑製備PS 微米球之研究.........................30
3-2-1. 反應溫度對PS 微米球之影響.........................30
3-2-2. 起始劑用量對PS 微米球之影響.......................31
3-2-3. 穩定劑用量對PS 微米球之影響.......................32
3-2-4. 75oC下製備均一大粒徑PS 微米球之研究...............33
3-2-5. 共溶劑對PS 微米球之影響...........................34
(a). 甲苯/乙醇共溶劑對PS 微米球之影響....................35
(b). 丁酮/乙醇共溶劑對PS 微米球之影響....................36
3-3. 甲醇溶劑製備PS 微米球之研究.........................53
3-3-1. 反應溫度對PS 微米球之影響.........................53
3-3-2. 起始劑用量對PS 微米球之影響.......................54
3-3-3. 穩定劑用量對PS 微米球之影響.......................55
3-3-4. 共溶劑對PS 微米球之影響...........................56
(a). 甲苯/甲醇共溶劑對PS 微米球之影響....................56
(b). 丁酮/甲醇共溶劑對PS 微米球之影響....................57
3-4. 醇類共溶劑對PS 微米球之影響.........................73
3-4-1 甲醇/異丙醇共溶劑對PS 微米球之影響..................73
3-4-2 甲醇/乙醇共溶劑對PS 微米球之影響...................74
第四章 結論.............................................82
參考文獻................................................84
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指導教授 陳暉(Hui-Chen) 審核日期 2016-6-16
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