本研究在製備光熱固化聚氨酯熱熔膠過程中，同時利用田口品質工程法與灰關聯度分析法，探討三種類型多元醇、三個NCO:OH比率、與辛基癸基丙烯酸酯添加莫耳比對於機械強度的影響，尋求一組最優化的參數。因此本研究總共分為四部分，第一部分使用田口法，運用田口直交表進行有效的降低實驗次數以及時間成本，尋求單品質最佳化的參數設計。
第二部份使用三種類型多元醇分別是酯類、醚類、聚碳酸酯類，提供不同的柔性與韌性特性，並搭配二異氰酸酯(MDI)提供的剛性鏈段性質，進行聚氨酯預聚體的聚合。聚氨酯熱熔膠反應體系中，使用特定量的二異氰酸酯先進行多元醇的封端，聚合出聚氨酯預聚體，接著使用丙烯酸羥乙酯終止聚合反應，最後使用辛基癸基丙烯酸酯鍵結更多C=O基團並使聚氨酯熱熔膠擁有光熱固化性能，並應用於尼龍織物的無縫貼合技術達成無溶劑、無揮發性氣體、可低溫貼合的製程，以解決傳統熱熔膠因高溫加工產生的黃化、翹曲、溢膠等問題，並探討三個田口品質特性對膠黏劑軟化溫度、剝離強度、剪切強度的影響。藉由傅立葉紅外線光譜儀(FTIR)分析官能基基團反應、超高效聚合物色譜儀(APC)檢測分子量以及分子量分佈、熱重損失(TGA)分析耐熱溫度、萬能拉力試驗機檢測剝離以及剪切強度。於FTIR的圖譜得知，在2268cm-1處屬於異氰酸酯的-NCO基團反應峰明顯消失；1730cm-1處的C=O反應峰隨著辛基癸基丙烯酸酯添加莫耳比越高，能量峰也隨之提升。APC結果得知，聚合物的分子量從10,000提升至30,000，驗證當丙烯酸酯封端完成後，聚氨酯預聚體可以與辛基癸基丙烯酸酯產生鍵結，達到光熱固化的功效。TGA的結果顯示，UV照光產生的交聯結構以及雙鍵結構的鍵結，可以有效的提升最高耐溫溫度，並且三種多元醇中，醚類多元醇擁有最高的熱裂解溫度349.89℃。
第三部份是將光熱固化聚氨酯熱熔膠應用於尼龍織物間的貼合，進行UV照光以及熱壓後測試。結果顯示，當使用聚碳酸酯多元醇、NCO:OH為4:1以及辛基癸基丙烯酸酯添加15莫耳比時，剝離強度達到最高1.627 kg/cm；當使用聚酯多元醇、NCO:OH使用4:1以及辛基癸基丙烯酸酯添加5莫耳比時，剪切強度達到最高33.96 kg/cm2，兩個強度皆達到廠商要求之標準。
第四部份是對光熱固化聚氨酯熱熔膠的聚合進行多品質最佳化參數優化的設計，首先使用田口品質工程方法尋求單品質最佳化的參數，接著使用灰關聯計算，獲取多品質最佳化的參數組合，並用於尼龍織物貼合後，其剝離強度與剪切強度分別可達到1.68 kg/cm以及34.94 kg/cm2，比未使用最佳化設計的強度分別提高3.26%及2.89%。

In the course of preparing photo-thermosetting polyurethane hot melt adhesive, this study used Taguchi quality engineering and grey relational analysis to discuss the influence of three types of polyhydric alcohol, three NCO:OH ratios, and the molar ratio of addition of octyl decyl acrylate on mechanical strength, while seeking for a group of optimal parameters. Therefore, this study was divided into four parts. Part I used Taguchi orthogonal array to effectively reduce the number of experiments and time cost in search for the parameter design of single quality optimization.
Part II used three types of polyhydric alcohol, which are esters, ethers, and polycarbonates, to provide different flexible and ductile properties. With the rigid chain segment properties provided by methylene diphenyl diisocyanate (MDI), the polyurethane performed polymer was polymerized. In the polyurethane hot melt adhesive reaction system, a specific amount of diisocyanate was used for the end capping of polyhydric alcohols. The polyurethane performed polymer was polymerized, and then the polymerization was terminated by using hydroxyethyl acrylate. Finally, more C=O groups were bonded by using octyl decyl acrylate, and the polyurethane hot melt adhesive was given the photo-thermosetting characteristic. Octyl decyl acrylate was used in the seamless bonding technique for nylon fabric to achieve a solvent-free and volatile gas free low-temperature bonding process, so as to solve the yellowing, warpage, and adhesive overflow issues of conventional hot melt adhesive resulting from high temperature processing. Moreover, this study discussed the influence of three Taguchi quality characteristics on the adhesive softening temperature, peel strength, and shear strength. The functional group reaction was analyzed by FTIR, and the peel strength and shear strength were tested by a universal tensile testing machine. According to the spectrum of FTIR, the -NCO group reaction peak of isocyanate at 2268 cm-1 obviously disappeared, and the C=O reaction peak at 1730 cm-1 increased with the molar ratio of addition of octyl decyl acrylate. According to the APC result, the molecular weight of polymer increased from 10,000 to 20,000-30,000, verifying that after the acrylate end capping was completed, the polyurethane performed polymer could bond with octyl decyl acrylate to achieve the photo-thermosetting effect. The result of TGA shows that the bonding of crosslinked structure and double bond structure resulting from UV irradiation could effectively increase the maximum temperature resistance. Furthermore, the ethers polyhydric alcohol had the highest pyrolysis temperature of 349.89℃ among the three types of polyhydric alcohols.
Part III used the photo-thermosetting polyurethane hot melt adhesive for nylon fabric bonding, and the test was performed after UV irradiation and hot pressing. The result shows that when the polycarbonate polyhydric alcohol was used, the NCO:OH was 4:1, and the addition of octyl decyl acrylate was 15 molar ratios, the peel strength reached the maximum of 1.627 kg/cm. When the polyester polyol was used, the NCO:OH was 4:1, and the addition of octyl decyl acrylate was 5 molar ratios, the shear strength reached the maximum of 33.96 kg/cm2. These two strengths have reached the manufacturer's standards.
Part IV performed the optimal design of multi-quality optimization parameters for the polymerization of photo-thermosetting polyurethane hot melt adhesive. First, the Taguchi quality engineering method was used to find the parameters of single quality optimization, and then the grey relation calculation was used to obtain the parameter combination of multi-quality optimization. When this combination was used in nylon fabric bonding, the peel strength and shear strength were 1.68 kg/cm and 34.94 kg/cm2, respectively, higher than that without the optimal design by 3.26% and 2.89%, respectively.

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