桐油改性酚醛环氧树脂合成及室温固化物性能

Synthetic Process of Tungoil Modified Phenolic Epoxy Resin and the Performance of Room Temperature Cured

以桐油与苯酚在酸催化下反应生成桐油苯酚取代物，并进一步在酸性条件下与甲醛反应生成桐油改性二阶酚醛树脂。利用FTIR，GPC等对其结构进行了表征。FTIR分析证明，桐油与苯酚的反应破坏了桐油的共轭双键，形成了新的取代产物。当该产物在酸性条件下与甲醛反应并进一步进行环氧化后。形成桐油改性酚醛环氧树脂。GPC研究表明，所形成的树脂是桐油改性环氧树脂与普通二阶酚醛环氧树脂的复合物。其中桐油改性环氧树脂的数均相对分子质量为3482。二阶酚醛环氧树脂的数均相对分子质量为619。选用了不同的室温固化剂对所合成的桐油改性酚醛环氧树脂和E-44环氧树脂复配物进行固化性能研究。研究表明．所合成的桐油改性酚醛环氧树脂与E44质量比在0．5～2．0进行复配，固化后可获得较好的力学性能。

A tungoil-phenol compound（TAP） and the tungoil modified phenolic epoxy resin（TMP） which were synthesized in the presence of acid catalyst, and the structure of these compounds were characterized by FTIR and GPC. FTIR analysis shows that the reaction between tungoil and phenol undermined the conjugate double bond of tungoil molecules, a new substitute product with phenol was formed. When the substitute product reacted with formaldehyde in the acid conditions and further reacted with epichlorohydrine, a tungoil modified phenolic epoxy resin（TMPE） was synthesized. The GPC analysis shows that resin is a mixture of tungoil modified epoxy resin and phenolic epoxy resin, and the molecular weight of tungoil modified phenolic epoxy resin and phenolic epoxy resin were 3 482 and 619 respectively. Solidification performance for the tungoil modified phenolic epoxy resins and E-41 epoxy resin at room temperature were investigated. The results show that when the mass ratio between tungoil modified phenolic epoxy resin and E-44 epoxy resin is at the range of 0. 5 to 2.0, the higher tensile strength can be obtained.