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研究生:張仁俊
研究生(外文):Jen-chun Chang
論文名稱:熱可塑性動態交聯彈性體mPE/EVA之製備與分析
論文名稱(外文):The Preparation and Characterization of Thermoplastic mPE/EVA by Dynamic Crosslinking
指導教授:袁維勵
指導教授(外文):Wei-Li Yuan
學位類別:碩士
校院名稱:逢甲大學
系所名稱:材料與製造工程所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:76
中文關鍵詞:矽烷EVAmPE動態交聯熱可塑性動態交聯彈性體
外文關鍵詞:thermoplastic vulcanizatesTPVmPEEVAdynamic cross-linkingsilane
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本研究中熱可塑性動態交聯彈性體mPE/EVA (ethylene-octene copolymer/ ethylene-vinyl acetate copolymer)之製備,使用TPOS (tetrapropoxy silane)與MPTS (3-methacryloxypropyltrimethoxy silane)當交聯劑,以DBTO (dibutyltin oxide)作為催化劑,在混練機中進行mPE與EVA摻混,EVA在混練中發生酯交換反應產生動態交聯,並發生相轉移,使扭力曲線上升後下降。後將熱可塑性動態交聯彈性體熱壓試片,進行各項性質分析比較。
當silane含量增加時,由DSC測試顯示出熔點及結晶度與因交聯效應而略微下降, 在TGA測試顯示熱穩定性因交聯效應而略微上升;從DMA的測試顯示tan δ略微降低而玻璃轉移溫度略為提高。凝膠程度測試發現Gel content隨著silane交聯劑含量的增加而提高;抗拉強度、伸長率、撕裂強度則隨著凝膠程度的增加而隨之下降。不同的silane含量會造成凝膠程度及結晶度的改變,使材料機械性質(抗拉強度、撕裂強度)產生變化。
Thermoplastic vulcanizates (TPV) based on blends of mPE/EVA (ethylene-octene copolymer/ethylene-vinyl acetate copolymer) were prepared by mixing and dynamic cross-linking in a batch mixer. A transesterification was carried out in the presence of a cross-linking agent TPOS (tetrapropoxy silane) or MPTS (3-methacryl oxypropyltrimethoxy silane) and an organometallic catalyst DBTO (dibutyltin oxide). During the mixing, EVA molecules were dynamically cross-linked to form sheared soft gels of EVA dispersed in the continuous phase of hard mPE. The torque curves raised first and then slightly dropped, marking the end of reaction. The produced TPV were further made into thin plates by heat-compression for mechanical and thermal analyses.
Results showed that firstly as the amount of cross-linking agent increases, the degree of vulcanization increases, as revealed by the gel content tests. Secondly, as the degree of vulcanization increases, the glass transition temperatures increases and tan δ decreases, revealed by the DMA test. On one hand, DSC analysis showed that the melting temperature and the crystallinity of the mPE phase decrease with the amount of cross-linker. On the other, the TGA analysis showed that the decomposition temperature and heat stability increases with the amount of cross-linker. As for mechanical tests, the tear strength, tensile strength, and elongation ratio decrease with increase of the curing degree. In addition, both agents gave similar trends. In conclusion, the silane concentration is the main factor to determine the mechanical properties of the TPV.
中文摘要I
英文摘要II
誌謝III
縮寫對照表IV
目錄V
表目錄VII
圖目錄IX

第一章 簡介 1
第二章 研究背景 6
2-1 文獻回顧 6
2-2 研究動機 11
2-3 反應機構 15
第三章 理論 19
3-1 聚摻合理論 19
3-2 相容性 21
3-3影響動態交聯結構與性質之因素 23
第四章 實驗 25
4-1 實驗藥品 25
4-2實驗儀器 26
4-3實驗步驟 28
4-4 實驗方法 31
第五章 結果與討論 36
5-1 混練曲線 36
5-2 硬度測試 39
5-3 比重測試 42
5-4 抗拉強度測試 45
5-5撕裂強度測試 50
5-6凝膠程度測定(Gel content) 53
5-7 熱性質分析樣品 56
5-8熱重分析樣品 59
5-9動態機械性質分析樣品 62
5-10場發射掃描式電子顯微鏡分析樣品 65
第六章 結論 67
參考文獻 69
附錄 75
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