Evolution of PMMA Latex During Solvent Annealing Process†

doi:10.7503/cjcu20150565

Abstract

Abstract:

A mono-dispersed poly(methyl methacrylate)(PMMA) latex dispersion was synthesized by emulsion polymerization. Small angle X-ray scattering technique was applied to determine the particle size and size distribution of the PMMA latex dispersion. The PMMA latex film was prepared by casting the diluted dispersion on a silicon substrate. Spectroscopic ellipsometer and scanning electron microscope were used for the investigation of the thickness and structure variations of the prepared latex film during two kinds of solvent annealing processes. When the PMMA latex film was annealed in the relatively good solvent vapor, such as acetone, there were two processes during solvent annealing: particle deformation and swelling. And when the PMMA latex was annealed in relatively poor solvent vapor, such as ethanol, there was only one process: the swelling process.

Key words: Poly(methyl methacrylate)(PMMA), Latex dispersion, Solvent annealing, Structure evolution, Spectroscopic ellipsometer

CLC Number:

O631

TrendMD:

ZHENG Nan, LIU Jiaxue, CHEN Ran, LAI Yuqing, MEN Yongfeng. Evolution of PMMA Latex During Solvent Annealing Process^†[J]. Chem. J. Chinese Universities, 2015, 36(12): 2576.

Figures/Tables 7

Fig.1 Integrated 1-dimentional and fitting curve from PMMA latex dispersion

Fig.2 Three layers Cauchy model used during fitting process in ellipsometric experiment

Fig.3 Fitting process of ellipsometric experiment (A) Amplitude fitting; (B) phase fitting.

Fig.4 Thickness variation of PMMA latex film during acetone(A) and ethanol(B) annealing process Annealing times: a. 1; b. 2; c. 3.

Fig.5 SEM image of cross section from PMMA dried latex film

Fig.6 SEM images of cross section from ethanol annealed PMMA latex film Annealing times: (A) 1; (B) 2; (C) 3.

Fig.7 SEM images of cross section from acetone annealed PMMA latex film Annealing times: (A) 1; (B) 2; (C) 3.

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