
酚醛
Heating is performed in the phenolic aldehyde mixed liquid preparing process so as to quicken the dissolution.
在制酚醛混合液過程中加熱,以加快其溶解速度。
Preparation of phenolic aldehyde-epoxy structural adhesive was elaborated and the factors which effect the properties of this adhesive were primarily discussed.
論述了酚醛-環氧結構膠粘劑的制備原理及工藝,讨論了影響酚醛-環氧結構膠粘劑的性能因素。
PLASTICS AND RESIN: AB, ABS emulsion, uric acid resin, phenolic aldehyde resin, urea-formaldehyde resin, formaldehyde resin, polythene, poly-chloroprene and etc.
塑料樹脂: AB,ABS乳液、尿醛樹脂、酚醛樹脂、密膠(脲)甲醛樹脂、聚乙烯、聚*********等。
The invention aims to solve the problems of poor fire resistant property and strong brittleness in the prior polyurethane foam and phenolic aldehyde foam respectively.
本發明拟解決現有聚氨酯泡沫阻燃性差,酚醛泡沫酥脆性強的問題。
The structural groups of carbonized products of phenolic aldehyde resin and polystyrene cation exchange resin treated at different temperatures are tested and analyzed with IR method.
用紅外光譜法對不同溫度下處理的酚醛和聚*********陽離子交換樹脂碳化産物的結構基團進行了測試分析。
酚醛(phenolic aldehyde)是由酚類化合物與醛類通過縮合反應形成的一類有機化合物。其核心結構包含酚羟基(-OH)直接連接在芳香環上,同時與醛基(-CHO)或其衍生物發生化學鍵合。這類化合物最典型的代表是苯酚甲醛(phenol-formaldehyde),它是合成酚醛樹脂(電木)的基礎原料。
在化學性質上,酚醛類物質的酚羟基具有強供電子效應,使芳香環的鄰位和對位具有較高反應活性,易與醛基發生親電取代反應。這種特性使其在聚合反應中形成三維網絡結構,造就了酚醛樹脂優異的耐熱性和機械強度。根據《有機化學命名原則》(國際純粹與應用化學聯合會,IUPAC),該類化合物的系統命名需同時體現酚環取代基的位置和醛基的衍生形式。
應用領域涵蓋:
美國化學會(ACS)出版物《Chemical Reviews》指出,現代研究聚焦于開發環境友好型酚醛合成工藝,通過酶催化等綠色化學手段降低傳統工藝中甲醛的過量使用。
Phenolic aldehyde 是由酚類(phenol)與醛類(aldehyde)通過縮聚反應形成的一類合成樹脂,屬于熱固性高分子材料。以下是詳細解釋:
the only childwater the plantsguestroomcleavecommit a crimederegulationinvolvingmidgemikingshellyunsuspectingwinceyacceptance checkcheck stubconversational implicaturedental plaquegas fieldin readinessred raspberrybonanzabreadlinecheerlycircumradiusdevelopabledewaxelectrohemostasisflamewarehavildarichniteMEMS