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

YIN Wen－hua， CHEN Yao， WU Bi-yao*

Abstract （427）

PDF （1054KB）（509）

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-44 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.

2007, 20 (2): 40-42.

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Preparation of Hyperbranched Epoxy Resin and Its Performance

WU Bi-yao， ZHANG Jun-heng， CHEN Yao， YIN Wen -hua

Abstract （331）

PDF （947KB）（506）

The AB2 monomer was prepared by trimellitic anhydride (TMA) and ethylene glycol.The syntheses of hyperbranched polymer based upon TMA as a core molecule and AB2 monomer which contains two single carboxylic group and one hydroxy groups were studied. Two types of hyperbranched polyester (G1,G2) with different relative molecular weight were obtained by reaction between TMA and AB2 monomer and reaction between G1 and TMA respectively with different mole ratio. Using phase transfer catalyst between epichlorohydrin and potash salt hyperbranched polymer, hyperbranched epoxy polymer of G1′ and G2′ was synthesized. The structure of products was characterized by using IR, GPC and 1HNMR. The results show that G1 and G2 have narrow relative molecular weight distribution with 1.008 1 and 1.011 0 respectively; the IR shows that the hyperbranched epoxy polymer is formed.

2007, 20 (1): 56-59.