- 學位論文
轉印技術滾輪材質之親疏水性調控
Controlling hydrophilicity and hydrophobicity of the roller material for contact printing.
摘要
本論文是以PDMS(Poly(dimethylsiloxane))為反應物，利用PDMS與交聯劑反應合成出交聯的PDMS，並將此交聯的PDMS與PEG(Poly(ethylene glycol))進行反應，但因為PDMS跟PEG都具有OH官能基，造成很難反應而無法達到改質效果，故需先將PEG酸化，再由交聯的PDMS與酸化的PEG進行Steglich esterification反應，合成出親水性較高的矽橡膠材料，且進一步探討該高分子之熱性質、親水性質及其後續應用。 研究中利用定量的PDMS，合成出兩種交聯度不同的高分子，接著再與不同克數的酸化PEG進行Steglich esterification反應，合成出不同PEG含量的鍵結。由1H─NMR圖譜和FTIR圖譜可以證明酸化的PEG合成成功，由XPS圖譜的鑑定，證明交聯PDMS接酸化PEG所得之高分子鍵結成功，由TGA的圖形分析輕度跟重度交聯PDMS熱裂解溫度(Td)約在351及355℃，改質後高分子之Td點上升，顯示具有良好的熱穩定性。由DSC的圖表中得到輕度跟重度交聯PDMS的玻璃轉移溫度(Tg)約為-52及-56℃，改質後高分子Tg也有穩定上升，由Contact angle測量，我們可以發現改質後的高分子比起交聯的PDMS，其接觸角下降，證明成功改善了親水性。
並列摘要
In this thesis, the PDMS (Poly(dimethylsiloxane)) is my reactant. The PDMS reacts with a crosslinking agent to synthesize the crosslinked PDMS. Then, crosslinked PDMS reacts with PEG (poly (ethylene glycol)) to synthesize the desired polymer. Because the PDMS and PEG have OH functional groups, the reaction can not achieve the effect of modified. I need to do PEG acidification and use crosslinked PDMS to react with acid-terminated PEG. The reaction is the Steglich esterification to synthesize the hydrophilic materials. Finally, I do some analysis to discuss the thermal properties, the hydrophilicity and its subsequent application of the polymer. The study uses quantitative PDMS, two different degree of crosslinking polymer, to react with different proportions acid-terminated PEG. The process is Steglich esterification reaction. By 1H-NMR and FTIR spectra can prove that the acid-terminated PEG synthesis is successful. By the XPS spectrum, the crosslinked PDMS reacts with acid-terminated PEG is successful. By TGA analysis, temperature (Td) of light and heavy crosslinking PDMS are 355.93 and 351.18 ° C. Modified polymers have higher Td, indicating good thermal stability. The glass transition temperature (Tg) of light and heavy crosslinking PDMS are -52 and -56 ° C. The modified polymers have a steady increase in Tg. In addition, in the graph and crystal melting temperature (Tm) was not observed by DSC chart to display the synthesized polymer not having a crystalline, and noncrystalline polymer. By contact angle analysis, the contact angle of modified polymers are decrease than crosslinking PDMS. It proves that the hydrophilic modification is successful.