POLYMER-POLYMER COMPLEXATION IN DILUTE AQUEOUS-SOLUTIONS - POLY(ACRYLIC ACID)-POLY(ETHYLENE OXIDE) AND POLY(ACRYLIC ACID)-POLY(VINYLPYRROLIDONE)
POLYMER-POLYMER COMPLEXATION IN DILUTE AQUEOUS-SOLUTIONS - POLY(ACRYLIC ACID)-POLY(ETHYLENE OXIDE) AND POLY(ACRYLIC ACID)-POLY(VINYLPYRROLIDONE)
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DOI：
10.1021/la00058a024
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发表时间：
1991-10-01
期刊：
影响因子：
3.9
通讯作者：
GUNDIAH, S
中科院分区：
文献类型：
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作者：
PRADIP;MALTESH, C;GUNDIAH, S
用荧光光谱法研究了聚丙烯酸(PAA)与聚氧乙烯(PEO)和聚乙烯基吡咯烷酮(PVP)在水溶液中的相互作用。考察了摩尔比、相对分子质量、溶剂等因素对反应的影响。氢键是这些聚合物相互作用的主要机制。准分子荧光研究表明，PVP-PAA络合物比PEO-PAA络合物更强，而且比PEO-PAA络合物更紧密。PVP和PAA之间的相互作用在比PAA和PEO更宽的pH范围内普遍存在。吡咯烷酮基团中氧的较高电负性是PVP与聚丙烯酸相互作用较强的原因。
Fluorescence spectroscopy of pyrene-labeled poly(acrylic acid) (PAA) was used to study its interactions with poly(ethylene oxide) (PEO) and poly(vinylpyrrolidone) (PVP) in aqueous solutions. The effects of molar ratio, molecular weight, and solvent were also investigated. Hydrogen bonding is the primary mechanism of interaction among these polymers. Excimer fluorescence studies show that the PVP-PAA complex is stronger than and exists in a more constricted form than the PEO-PAA complex. Interactions between PVP and PAA are prevalent over a wider pH range than those of PAA and PEO. The higher electronegativity of the oxygen in the pyrrolidone group is attributed as the reason for the stronger interaction of PVP with poly(acrylic acid).