聚胺酯丙烯酸樹脂應用於寬廣高阻尼材料之研究

Abstract

本研究之阻尼材料主要分成兩種：其中一種為聚胺酯丙烯酸樹脂(UARs)與甲基丙烯酸-2-羥基乙酯(HEMA)混合之共聚物，另一種為聚胺酯丙烯酸樹脂混掺聚胺酯(PU)藉由兩步合成或是一次合成。所合成之聚胺酯丙烯酸樹脂為：雙官能基聚胺酯丙烯酸樹脂和單官能基丙烯酸樹脂。研究不同種類的異氫酸鹽、不同種類的聚醇類、不同分子量的聚醇類對於聚胺酯丙烯酸樹脂在熱機械性質和阻尼行為之影響。結果發現阻尼能力會隨著聚胺酯丙烯酸樹脂懸吊側鏈之長度增長而提升。當混入甲基丙烯酸-2-羥基乙酯含量的增加，聚胺酯丙烯酸樹脂和甲基丙烯酸-2-羥基乙酯共聚物之玻璃轉移溫度也隨著向高溫移動。而當隨著混掺聚胺酯的含量增加，聚胺酯丙烯酸樹脂/聚胺酯之拉伸率也隨之增加，且利用兩步合成之聚胺酯丙烯酸樹脂/聚胺酯之阻尼性質較一次合成之聚胺酯丙烯酸樹脂/聚胺酯更好。

Studies on damping materials were prepared from two types of materials: the copolymer of urethane acrylate resins(UARs)/2-hydroxyethyl methacrylate (HEMA) and urethane acrylate resins/polyurethane(PU) blended by two step or one shot. Two types of urethane acrylate resins: difunctional urethane acrylate (DUA) and monofunctional urethane acrylate (MUA) were synthesized. The effects of different type of diisocyanate, different types of polyols and different molecular weights of polyols in the UARs on the dynamic mechanical properties, and damping behavior were investigated. The results show that the damping ability was enhanced through side-chain length which UARs dangled increased. As the contents of HEMA increased, the glass transition temperture of the copolymer of UARs/HEMA increased. When the content of PU increased, elongation of the blend of UARs/PU increased. UARs/PU by two step exhibit much higher damping properties than UARs/PU by one shot.