- 學位論文
兩液型壓克力結構膠之儲存安定性的探討
Two-liquid type acrylic structural adhesive of the storage stability.
摘要
本論文主要探討雙液型壓克力結構膠可以部分取代環氧結構膠。現鑒於市售兩液型環氧結構膠的儲存安定性及保存期限都遠比壓克力結構膠的儲存安定性及保存期限來的好，但是在室溫下無法快速固化；故計畫研究能取代環氧結構膠，在室溫下可以快速固化，又能夠有長久的保存日期的壓克力結構膠。但是壓克力結構膠室溫下的保存日期短，需存放在低溫下，故以添加抗氧化劑，讓壓克力結構膠在室溫下有較佳的儲存期6個月，然而物理性質及機械性質，經過6個月的儲存與原始相近。 本研究發現，當壓克力結構膠液內未添加抗氧化劑時，進行MMA：2-HEMA不同重量比來測試儲存安定性及熱穩定性。實驗研究發現2-HEMA添加量越多，以DSC設備、流變儀設備分析，膠液經過3個月儲放於室溫下的環境中進行測試，其吸熱最大峰溫度值越低且黏度越高，此顯示膠液長時間的過程自身已經慢慢反應。再以數位式電子烘箱的烘烤加速度老化測試，其膠液的流動性慢慢變差，即凝膠（gel）的時間越短。而當以MMA：2-HEMA為100：0及90：10的重量比當配方基礎時，未添加抗氧化劑的加速老化測試的時間遠比其他重量比來的佳，但MMA：2-HEMA為100：0，其反應固化時間略慢，所以實驗研究以MMA：2-HEMA為90：10來進行測試。故MMA：2-HEMA為90：10的重量比配方添加不同類型的抗氧化劑後，實驗研究得知添加單一抗氧化劑，經過加速老化的測試，其對於未添加前的儲存安定性略有增加，但經過6個月的時間，其儲存穩定性不佳。最後改以添加兩種酚類抗氧化劑時，其儲存穩定性及機械性質與原始相近並無大變化的衰退。
並列摘要
This paper mainly discusses the two-liquid type acrylic structure adhesive can be part to replace the epoxy glue. Given the current market the two liquid type epoxy structure adhesives storage stability and the expiration date than acrylic plastic storage stability and the Expiration date of good, but it can’t fast-curing at room temperature ; the plan's to study to replace the epoxy structure glue, can be at room temperature fast-curing, but also to have long-term preservation of the date of acrylic structural adhesive. However, the structure of acrylic plastic at room temperature to preserve the date of the short, to be stored at low temperatures, it is to add anti-oxidants, so that the structure of acrylic plastic at room temperature for a better shelf life for 6 months, but the physical nature and mechanical properties after storage for 6 months is similar to the original. This study found that when acrylic structural adhesive does not add anti-oxidants, the MMA：2-HEMA for different weight ratio to test the storage stability and thermal stability. Experimental study found that the volume of 2-HEMA add more equipment to DSC, remoter equipment analysis, glue after 3 months storage at room temperature environment for the conduct of the test, the endothermic maximum peak temperature and viscosity of the lower value the more high, this shows that the process of dispensing their own time response has been slow. Then several of the baking oven electronic acceleration aging test, the mobility of the liquid slowly deteriorated, or gel (gel) the shorter the time. When the MMA : 2-HEMA for the 100：0 and 90：10 weight ratio of the base when the formula did not add anti-oxidants of accelerated aging test of time than other to-weight ratio of the best, but for the MMA : 2-HEMA 100：0, the reaction of curing time slightly slower, so experiment to study MMA : 2-HEMA for the 90：10 test. Therefore, MMA : 2-HEMA for the 90：10 weight ratio of formula to add different types of anti-oxidants, the experimental study of a single antioxidant know to add, after the accelerated aging test did not add to the storage stability prior to a slight increase in However, after six months, and its poor storage stability. The last change to add two phenolic antioxidants, its storage stability and mechanical properties similar to those with no major changes in the original recession.