Aggregation of poly(methacrylic acid)‐poly(ethylene oxide) complex in aqueous medium
1981; Wiley; Volume: 182; Issue: 8 Linguagem: Inglês
10.1002/macp.1981.021820816
ISSN0025-116X
AutoresHiroyuki Ohno, Hiro Matsuda, Eishun Tsuchida,
Tópico(s)Electrostatics and Colloid Interactions
ResumoAbstract It is known that poly(methacrylic acid) and poly(ethylene oxide) interact with each other through hydrogen bonds and form polymer complexes in an aqueous medium. The initially formed polymer complexes were considered to exist in a semi‐stable state, and they aggregated through desolvation and hydrophobic interaction. A successive aggregation of polymer complexes was observed following the rapid initial complexation. The aggregation was affected by some chemical factors e.g., polymer concentration, temperature, pH and so on. These effects were measured as the changes of the molecular shape by means of laser‐light scattering, turbidity measurements, and scanning electron microscopy. It was observed that lower pH and higher temperature made the aggregation faster within such experimental conditions as pH 2–7, 20–50°C. The aggregates were nearly spherical with almost the same diameter (200 nm), and spontaneously grew larger with time.
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