研究生: |
黃俊翰 CHUN-HAN HUANG |
---|---|
論文名稱: |
以傳統乳化聚合法及RAFT活自由基乳化聚合法合成用於不飽和聚酯、乙烯基酯及環氧樹脂之奈米級及次微米級壓克力核殼型橡膠添加劑 Synthesis of nano-scale and submicron-scale acrylic type of core-shell rubber additives by conventional and RAFT living free radical emulsion polymerizations for unsaturated polyester, vinyl ester, and epoxy resins |
指導教授: |
黃延吉
Yan-Jyi Huang |
口試委員: |
陳崇賢
Chorng-Shyan Chern 邱文英 Wen-Yen Chiu |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2009 |
畢業學年度: | 97 |
語文別: | 中文 |
論文頁數: | 373 |
中文關鍵詞: | 不飽和聚脂 、核殼型橡膠 、環氧樹脂 、乙烯基酯樹脂 、種子乳化聚合 、可逆加成斷裂鏈轉移 |
外文關鍵詞: | unsaturated polyester resin (UP), core-shell rubber(CSR), epoxy resin (EPR), vinyl ester resin (VER), seeded emulsion polymerizations, reversible addition-fragmentation chain transfer |
相關次數: | 點閱:443 下載:5 |
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本文是探討以乳化聚合法合成具有不同奈米級與次微米級顆粒大小和不同外殼組成的核殼型橡膠(CSR)、反應型微膠顆粒(RM)、以RAFT聚合法採用無界面活性劑乳化聚合法合成之CSR、及以RAFT聚合法採用自發性相反轉聚合法合成之CSR添加劑,以作為不飽和聚酯樹脂(UP),環氧樹脂(EPR)及乙烯基酯樹脂(VER)的抗體積收縮劑(LPA)及增韌劑。吾人並合成兩種傳統不同化學結構之UP,包括MA-PG型、MA-PA-PG型UP,及vinyl ester resin (VER)與環氧樹脂(EPR),進而設計出具不同相溶性之苯乙烯(St)/UP(或VER)/CSR或EPR/DDM/CSR三成份系統。
吾人先以半批次進料方式聚合丙烯酸正丁酯(BA),形成PBA軟質核心,再以批次進料方式聚合甲基丙烯酸甲酯(MMA),形成PMMA硬質外殼,CSR之外殼並且不加或加入交聯劑(EGDMA)進行改質,以合成外殼未交聯或交聯之PBA/PMMA核殼型橡膠。另外,CSR之外殼吾人亦以甲基丙烯酸環丙氧酯(Glycidyl methacrylate, GMA)或甲基丙烯酸(methacrylic acid, MAA) 共單體改質,以合成出具高極性及具特殊官能基基團外殼之CSR,以增加CSR外殼之極性及與樹脂基材化學交聯之能力。吾人利用Debye’s eq.及基團貢獻法,計算出UP、EPR、VER與CSR之外殼的偶極矩,以解釋St/UP(或VER)/CSR或EPR/DDM/CSR三成份系在25℃及110℃下未反應前之相溶性。吾人亦利用掃描式電子顯微鏡(SEM)來觀測St/UP(或VER)/CSR或EPR/DDM/CSR三成份系在110℃下聚合固化後樣品破壞面的微觀型態,藉以瞭解CSR的外殼化學組成與顆粒大小對St/UP(或VER)/CSR或EPR/DDM/CSR三成份系在聚合固化過程中之相溶性影響。不同之CSR添加量,對St/UP(或VER)/CSR三成份系統在聚合固化過程中之相容性影響,亦在文中探討。
Synthesis of acrylic type of core-shell rubbers (CSR) with varied nano-scale and submicron-scale particle size and shell chemical composition, reactive microgel, CSR by RAFT surfactant-free, batch emulsion polymerization , and CSR by RAFT polymerization via spontaneous phase inversion process as low-profile additives (LPA) and tougheners for unsaturated polyester resins (UP) ,epoxy resin (EPR) and vinyl ester resin (VER) have been investigated . Two types of conventional nsaturated polyester resin with different chemical structures, namely, MA-PG type of UP and, MA-PA-PG type of UP, epoxy resin (EPR) and vinyl ester resin (VER) ,have also been synthesized so that styrene (St) /UP(or VER) /CSR or EPR/DDM/CSR ternary systems with different miscibility can be designed.
In the synthesis of the core-shell rubber, a semi-batch process was used to synthesize the soft core, which was made from poly(butyl acrylate) (PBA) , whereas a batch process was to employed to synthesize the hard shell , which was composed of poly(methyl methacrylate) (PMMA) . Also, the shell of the CSR was modified with or without a crosslinking agent, ethylene glycol dimethacrylate (EGDMA). In addition, the shell of CSR has also been modified by introducing glycidyl methacrylate(GMA) or methacrylic acid(MAA) as a comonomer to both increase the molecular polarity and provide the specific functionality for the shell of the CSR. By using Debye’s equation and the group contribution method, the dipole moments of UP、VER、EPR and the shell component of the CSR can be calculated, which can then explain the phase characteristics of the St/UP(or VER)/CSR and the EPR/DDM/CSR ternary system prior to the reaction at 25℃ and 110℃ . Also , the effect of the shell composition of CSR and CSR particle size on the compatibility of the St/UP(or VER)/CSR and EPR/DDM/CSR ternary system during the cure has been investigated by the cured sample morphology as observed by scanning electron microscopy (SEM) . The effects of CSR content on the compatibility of different St/UP(or VER)/CSR and EPR/DDM/CSR ternary systems during the cure have been dealt with as well.
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