【摘要】 利用聚乙烯-乙烯醇可以溶解在苯酚水溶液中的特性制备的聚乙烯-乙烯醇改性酚醛树脂,并采用IR,DSC,TG,SEM和TEM等分析手段研究了聚乙烯-乙烯醇改性酚醛树脂的固化反应特性以及微观形态。研究表明:聚乙烯-乙烯醇中的羟基与酚醛树脂中的羟甲基在固化过程中缩聚形成内增韧结构,有效提高了酚醛树脂的韧性,并使其耐热性能下降较低,而且与IR,DSC,TG分析结果相一致。更多还原

【Abstract】 In this paper, thermosetting phenolic resin modified by polyathylene-vinyl alcohol which can dissolve in phenol water was prepared. And its cured character and microscopic configuration were researched with IR,DSC,TG,SEM and TEM spectra. During curing process, hydroxy group of polythylene-vinyl alcohol was condensed with hydroxymethod of phenolic resin into intersectional structure, which was good at heat-resistance and toughness. And the analysis conclusion of SEM and TEM spectra were correspondence with that of IR, DSC,TG spectra analysis.更多还原