The association of aqueous phenolic resin with polyethylene oxide and poly(acrylamide‐co‐ethylene glycol)
The association of aqueous phenolic resin with polyethylene oxide and poly(acrylamide‐co‐ethylene glycol)
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DOI：
10.1002/pola.1995.080331506
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发表时间：
1995-11
期刊：
影响因子：
--
通讯作者：
H. Xiao;R. Pelton;A. Hamielec
中科院分区：
文献类型：
--
作者：
H. Xiao;R. Pelton;A. Hamielec
将由丙烯酰胺和聚（乙二醇）甲基丙烯酸酯大分子单体（PAM-co-PEG）形成的梳形共聚物与聚（环氧乙烷）（PEO）在与水性酚醛树脂形成氢键复合物方面进行了比较。两种高分子量聚醚的性能相似。络合物的形成给了一个短暂的粘度增加，然后沉淀。PEG侧链长度≥ 9的共聚物与酚醛树脂形成复合物，而分子量为2000的PEG均聚物不形成复合物。对于共聚物和高分子量PEO，当pH从7降低到4时，络合物沉淀的趋势增加。阳离子染料吖啶橙子与酚醛树脂结合，加入PEO后，形成直径约20 μm的可见复合凝胶。
Comb copolymers formed from acrylamide and poly(ethylene-glycol) methacrylate macromonomer (PAM-co-PEG) were compared to poly(ethylene oxide) (PEO) with respect to hydrogen bond complex formation with water-borne phenolic resins. The behaviors of the two types of high molecular weight polyethers were similar. Complex formation gave a transient increase in viscosity followed by precipitation. Copolymers with pendant PEG chain lengths ≥ 9 formed complexes with phenolic resin whereas PEG homopolymer with a molecular weight of 2000 did not form a complex. For both copolymer and high molecular weight PEO, the tendency of the complex to precipitate increased when the pH was decreased from 7 to 4. Acridine orange, a cationic dye, bound to the phenolic resin and, after the addition of PEO, yielded visible complex gels with diameters about 20 μm.