研究生: |
林品華 Pin-Hua - Lin |
---|---|
論文名稱: |
丙烯酸酯系熱熔感壓膠的合成並應用於無縫貼合尼龍織物 Synthesis of Acrylate Hot Melt Pressure Sensitive Adhesive for Seamless Bonding of Nylon Fabric |
指導教授: |
郭中豐
Chung-Feng Kuo |
口試委員: |
楊勝俊
none 董泯言 none 黃昌群 Chang-Chiun Huang |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 178 |
中文關鍵詞: | 熱熔感壓膠 、紫外光UV固化 、自由基聚合反應 、丙烯酸酯 、田口方法 、本質轉換選擇消去法 |
外文關鍵詞: | hot melt pressure sensitive adhesive (HMPSA), ultraviolet (UV), free radical polymerization, acrylate, taguchi, elimination et choice translating reality (ELECT |
相關次數: | 點閱:553 下載:7 |
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本研究利用紫外光(Ultraviolet, UV)固化技術,全程無使用有機溶劑製備丙烯酸酯熱熔感壓膠(Hot melt pressure sensitive adhesive, HMPSA),應用於尼龍纖維之無縫貼合技術,解決目前熱熔感壓膠因本體聚合放熱反應的熱能無法迅速釋放,而產生凝膠現象及溶液聚合反應時間冗長與有機溶劑汙染的問題,達到快速生產之目的。
本研究分為紫外光合成丙烯酸酯寡聚物、紫外光固化熱熔感壓膠製備以及熱熔感壓膠製程最佳化參數設計與實務驗證三個部分進行討論,達到無使用溶劑、低溫貼合及快速生產之目的。
第一部分為紫外光丙烯酸酯寡聚物的合成,原料組成為軟單體丙烯酸丁酯(Butyl acrylate, BA)賦予熱熔感壓膠初黏性能,功能性單體丙烯酸(Acrylic acid, AA)、丙烯酸-2-羧乙酯(Beta-carboxyethyl acrylate, BCEA)及丙烯酸羥乙酯(2-Hydroxyethyl acrylate, HEA)提供熱熔感壓膠內聚強度,光引發劑2,4,6-三甲基苯甲醯基-二苯基氧化膦(Diphenyl 2,4,6-trimethylbenzoyl phosphine oxide, TPO)可在紫外光下進行自由基聚合反應增加交聯度。
使用傅立葉轉換紅外線光譜儀(Fourier transform infrared spectroscopy, FTIR)分析官能基結構、凝膠滲透層析儀(Gel permeation chromatography, GPC)分析分子量與分布指數、示差掃描熱卡量計(Differential scanning calorimetry, DSC)分析玻璃轉化溫度。結果顯示,添加BA 90 wt%、AA 10 wt%、TPO 8 phr時達到最大凝膠含量為95.89%,表示交聯效果良好,以利後續熱熔感壓膠的製備。
第二部分為紫外光固化製備熱熔感壓膠。將第一部分之丙烯酸酯寡聚物作為基礎樹脂,添加光引發劑TPO與活性稀釋劑甲基丙烯酸缩水甘油酯(Glycidyl methacrylate, GMA)混合後塗佈於離型膜,經由紫外光固化形成熱熔感壓膠。TPO在照射紫外光後會進行自由基聚合反應可增加含膠量(Gel content)提升交聯程度,GMA可增加玻璃轉移溫度提升內聚力。將熱熔感壓膠置於兩片尼龍纖維布間進行熱壓(1 kg/cm2, 100 ℃)貼合測試。製備出最佳實驗組合為BA 90 wt%、AA 10 wt%、GMA 30 wt%及TPO 8 phr,經由紫外光固化製備的熱熔感壓膠之ΔE(總色差)=1.86、ΔL(明暗差異)=-17.52、Δa(紅綠差異)=-1.25、Δb(黃藍差異)=1.40、溢膠1.0 mm、耐水洗50次及-30 ℃低溫測試後之剝離強度與剪切強度達1.0 kg/cm以及13 kg/cm2以上。
第三部分為熱熔感壓膠製程最佳化參數設計與實務驗證,利用田口方法(Taguchi method)與本質轉換選擇消去法(Elimination et choice translating reality, ELECTRE)進行實驗規劃,將繁雜的實驗次數與成本縮減最少,尋找產品最佳化製程參數組合,進行熱壓貼合測試,測得耐水洗50次及-30 ℃低溫測試後之剝離強度與剪切強度達1.0 kg/cm以及13 kg/cm2以上。驗證可有效提升黏著性能,達到紡織廠尼龍織物無縫貼合使用上之需求規範。
This study uses ultraviolet (UV) to prepare hot melt pressure sensitive adhesive (HMPSA) without organic solvent, which is applied to seamless bonding technique for nylon fiber to solve the problems in HMPSA, The heat energy of the bulk polymerization exothermal reaction cannot be released rapidly, so that the macrochain generates gel; The solution polymerization time is too long and the organic solvent is difficult to be recovered; and to implement rapid production.
This study is divided into three parts for discussion, synthesizing acrylate oligomer by UV curing, preparing HMPSA by UV curing, and hot melt pressure sensitive adhesive process optimization parameter design and practical validation, aiming to implement not using solvent, low temperature bonding and rapid production.
Part 1 is the synthesis of acrylate oligomer by UV, the raw materials are: The soft monomer butyl acrylate (BA) endues the hot melt pressure sensitive adhesive with tack property, the functional monomer acrylic acid (AA)、beta-carboxyethyl acrylate (BCEA) and 2-hydroxyethyl acrylate (HEA) provides the hot melt pressure sensitive adhesive with cohesive strength, the photoinitiator Diphenyl 2,4,6-trimethylbenzoyl phosphine oxide (TPO) performs free radical polymerization in UV to enhance the cross-linking level.
The Functional group structure, molecular weight and its distribution index, and glass transition temperature (Tg) of oligomers are analyzed by using fourier transform infrared spectroscopy、gel permeation chromatography and differential scanning calorimetry. The results show that the maximum gel content is 95.89% when the addition of BA 90 wt%, AA 10 wt%, and TPO 8 phr, meaning the crosslinking effect is good, favorable for subsequent preparation of HMPSA.
Part 2 is preparation of HMPSA by UV curing. The acrylate oligomer of the first part is used as basic resin, the mixture of photoinitiator (TPO) and reactive diluent (glycidyl methacrylate, GMA) is coated on the release film, the HMPSA is formed by UV curing. The TPO performs free radical polymerization in UV, increasing the gel content to upgrade the degree of crosslinking, the GMA can increase the Tg to enhance the cohesion. The HMPSA is placed between two pieces of nylon fiber fabric for hot pressing (1 kg/cm2, 100 ℃) bonding test. The optimum experimental combination is BA 90 wt%, AA 10 wt%, TPO 8 phr and GMA 30 wt%, the ΔE (total chromatic aberration) of HMPSA prepared by UV curing is 1.86, the ΔL (bright-dark difference) = -17.52, Δa (red-green difference) = -1.25, Δb (yellow-blue difference) =1.40, after 50 times of washable test and -30 ℃ low temperature test, the peel strength and shear strength are higher than 1.0 kg/cm and 13 kg/cm2 respectively.
Part 3 is HMPSA process optimization parameter design and practical validation. The taguchi method and elimination et choice translating reality (ELECTRE) are used for experimental design to reduce the number and cost of experiments and to look for the product optimization process parameter combination. The hot pressing bonding test is implemented, after 50 times of washable test and -30 ℃ low temperature test, the peel strength and shear strength are higher than 1.0 kg/cm and 13 kg/cm2. The adhesion is enhanced effectively, meeting the requirement specifications for seamless bonding of nylon fabric of textile mills.
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