本研究是利用UV-A波段之紫外光來固化不同成份及不同組成的聚酯壓克力樹脂。照光時間為20分鐘，在持續通入氮氣的環境中，使樣品完全硬化。 在固定光起始劑含量2%而改變寡聚物和單體比例時，含雙官能基或三官能基單體之壓克力，其起始解溫度隨單體比例增加而變大，含單官能基單體之壓克力則隨單體比例增加而變小；含雙官能基或三官能基單體之壓克力，其熱膨脹係數隨單體比例增加而變小，含單官能基單體之壓克力則隨單體比例增加而變大；而改變寡聚物和單體比例，則對玻璃轉化溫度沒有影響。且三官能基單體之壓克力樹脂具有最高的起始裂解溫度、最小的熱膨脹係數、及較高的玻璃轉化溫度。在固定寡聚物和單體含量而增加光起始劑含量時，無論使用何種單體，其起始裂解溫度均會變低、熱膨脹係數均變大、玻璃轉化溫度均下降。 The UV-A ultraviolet was applied to cure polyester acrylate resins which are composed of different component and different composition, respectively. The samples were completely cured at a fixed UV-exposure time of 20 minutes by adding nitrogen during UV irradiating.Firstly, the percentages between oligomer and monomer changed and the content of photoinitiator was fixed at 2 wt%. The initial decomposition temperature of the acrylate resins with two-function-group or three-function-group monomer will increase with increasing monomer percentage. The thermal expansion coefficient of acrylate resins with two-function-group or three-function-group monomer will decrease with increasing monomer percentage. Nevertheless, these variation trends are contrary to those of the samples with single-function-group monomer. Besides, there is no obvious influence on glass transition temperature of the acrylate resins no matter which monomer is used. The samples with three-function-group monomer have the highest initial decomposition temperature, the lowest thermal expansion coefficient, and a higher glass transition temperature.Secondarily, the percentages of oligomer and monomer were fixed and the content of photoinitiator was increased. No matter which monomer is used, the initial decomposition temperature and glass transition temperature of the acrylate resins will decrease, but the thermal expansion coefficient of the samples will increase.
