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Miscibility of Two Components in a Binary Mixture of 9-Phenyl Anthracene Mixed with Stearic Acid or Polymethyl Methacrylate at Air–Water Interface

P. K. Paul, Md. N. Islam, D. Bhattacharjee and S. A. Hussain

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We report the miscibility characteristics of two components in a binary mixture of 9-phenyl anthracene (PA) mixed with stearic acid (SA) or polymethyl methacrylate (PMMA). The behaviour of surface pressure versus area per molecule isotherms reveal that the area per molecule decreases systematically with increasing molefractions of PA. The characteristics of areas per molecule versus molefractions and collapse pressure vs molefraction indicate that various interactions involved among the sample and matrix molecules. The interaction scheme is found to change with the change in surface pressure and molefraction of mixing. Scanning electron microscopic study confirms the aggregation of PA molecules in the mixed films.


PACS

64.75.-g Phase equilibria

61.25.H- Macromolecular and polymers solutions; polymer melts

68.18.-g Langmuir-Blodgett films on liquids

Subjects

Soft matter, liquids and polymers

Surfaces, interfaces and thin films

Dates

Issue 5 (May 2007)

Received 25 December 2006



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