環氧樹脂與不同末端基聚胺基甲酸酯樹脂之反應性及其硬化摻合樹脂之性質

Reactivity of Epoxy Resin with Polyurethane Resin Containing Different End Groups and Properties of Their Cured Blended Resins

楊彝綱(Yi-Gang Yang) ； 李文昭(Wen-Jau Lee)

《林產工業》 36卷1期 (2017/03) Pp. 37-46

https://doi.org/10.6561/FPI.2017.36(1).4

摘要

本研究利用雙酚A 與環氧氯丙烷反應合成雙酚A 型環氧樹脂（Epoxy resin；ER），另以聚乙二醇為多元醇原料，異氟爾酮二異氰酸酯（Isophorone diisocyanate）為異氰酸酯原料，1,4-丁二醇及乙二胺為鏈延長劑合成含NCO、NH 及OH 末端基之聚胺基甲酸酯樹脂（Polyurethane resins；PU），探討ER 樹脂與PU 樹脂之反應性及硬化ER/PU摻合樹脂之物理、機械及熱性質。由試驗結果得知，ER 樹脂可與PU 樹脂發生架橋反應，DSC 分析結果顯示NCO-PU與ER樹脂之反應性大於NH-PU及OH-PU。添加NCO-PU可提高ER樹脂之彎曲強度，並以ER/NCO-PU重量比100/10之摻合樹脂有最大彎曲強度，然添加NH-PU 及OH-PU 者彎曲強度降低。DMA 分析結果顯示，三種摻合樹脂之相轉移溫度依序為ER/NCO-PU＞ER/NH-PU＞ER/OH-PU，其中ER/NH-PU 及ER/OH-PU 摻合樹脂內部存在兩相結構，ER/NCO-PU 摻合樹脂則為均質結構。不同末端基PU 樹脂所製作ER/PU 摻合樹脂有相似之熱重分析曲線，然與ER樹脂比較，摻合樹脂之熱抵抗性降低，其熱重損失曲線向低溫側偏移。

關鍵字

摻合樹脂 ； 鏈延長劑 ； 環氧樹脂 ； 聚胺基甲酸酯樹脂 ； 熱性質

並列摘要

In this study, epoxy resin (ER) was synthesized by reacting bisphenol A with epichlorohydrin. Polyurethane resins (PU) with NCO-, NH- and OH-end group were prepared by using polyethylene glycol and isophorone diisocyanate as the polyol and isocyanate, respectively, and with 1,4-butanediol and ethylenediamine as chain extenders. The reactivity of ER with PU and the physical, mechanical and thermal properties of cured ER/PU blended resins were investigated. The experimental results show that the crosslinking reaction could occur between ER and PU. DSC analysis shows that the reactivity of NCO-PU with ER was higher than that of NH-PU and OH-PU. The bending strength of ER increased when blended with NCO-PU. Among which, ER/NCO-PU blended resin with the weight ratio of 100/10 had the highest bending strength. However, the bending strength decreased when blended with NH-PU and OH-PU. The experimental result of DMA shows that the phase transition temperatures for blended resin were in the order of ER/NCO-PU ＞ ER/NH-PU ＞ ER/OH-PU. In addition, a two-phase structure existed in blended resins of ER/NH-PU and ER/OH-PU, while it formed a homogeneous structure for ER/NCO-PU. ER/PU blended resins that prepared with different end group PU resins had similar thermogravimetric analysis curves. However, compared with ER resin, the thermal resistance of blended resins decreased. Their thermogravimetric loss curves shifted to the low temperature side.

並列關鍵字

Blended resins ； Chain extenders ； Epoxy resin ； Polyurethane resin ； Thermal properties