Effect of Annealing on the Surface Properties of Poly(n-butyl methacrylate) Latex Films Containing Poly(styrene/α-methylstyrene/acrylic acid)

Shin, Jin Sup and Lee, Doug Youn and Ho, Chee Cheong and Kim, Jung Hyun (2000) Effect of Annealing on the Surface Properties of Poly(n-butyl methacrylate) Latex Films Containing Poly(styrene/α-methylstyrene/acrylic acid). Langmuir, 16 (4). pp. 1882-1888. ISSN 0743-7463

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Official URL: https://doi.org/10.1021/la9906370

Abstract

The effect of alkali-soluble resin (ASR) postadded to emulsifier-free monodisperse poly(n-butyl methacrylate) latexes (PBMA) on the surface properties of the latex films formed was investigated using the contact angle method. The contact angles of a probe liquid (containing 50:50 wt % ethylene glycol and water) on the film surface were determined as a function of the annealing temperature of the film and the annealing duration. The ASR, poly(styrene/α-methylstyrene/acrylic acid), was found to exude to the air/polymer interface after annealing, as monitored using FTIR-ATR. Thus the surface properties of the films were dependent on the concentration of the ASR employed, the annealing temperature, and the duration. Annealing the film at a temperature approximately equal to the Tg of ASR allows them (ASR) to undergo unrestricted migration to the film surface and also to expose the hydrophobic region of their chains to the surface. The more hydrophobic character of the film annealed at 150°C with a higher contact angle as compared to that at 50°C is a result of the change in chain conformation of the ASR at the surface brought about by annealing. Also, the results illustrate that the hydrophobic-hydrophilic character of the PBMA-SAA film surface can be changed readily by merely adjusting the annealing temperature.

Item Type: Article
Additional Information: Ho, C.-C. Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Uncontrolled Keywords: Alkali soluble resin; Chain conformations; Polybutyl methacrylates; Polymethyl styrene
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Sep 2021 02:57
Last Modified: 02 Sep 2021 02:57
URI: http://eprints.um.edu.my/id/eprint/26011

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