Film formation kinetics of polystyrene latex-based nanocomposites with a broad particle size distribution

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作   者：

Demirbay, Baris; 

作者机构：

Stockholm University; 

关键词：

interdiffusion;  film formation;  POLYMER DIFFUSION;  TEMPERATURE;  INTERDIFFUSION;  light transmission;  particle size distribution;  void closure; 

期刊名称：

Polymer engineering and science

i s s n：

0032-3888

年卷期：

2024 年 64 卷 1 期

页   码：

119-129

页   码：

摘   要：

The present study article aims to clarify the effect of colloidal polystyrene (PS) latexes with a broad particle size distribution on film formation kinetics of multi-walled carbon nanotube (MWCNT)-added polymer nanocomposites by considering theoretical film formation models. Experimentally, light transmitted from nanocomposite films, each having different weight fractions of MWCNT, was recorded at different annealing temperatures via UV-Visible spectrophotometry. Optical data set was then theoretically elaborated by taking into account void closure and Prager-Tirrell models. Activation energies of viscous flow (Delta H) and backbone motion for reptating PS chains (Delta E-B), minimum film formation (T-0) and healing (T-h) temperatures were then computed from optical data. Experimental results revealed that Delta H required for void closure phenomenon remained unaffected by both nanofiller and size distribution of latexes. On the other hand, it was found that Delta E-B for backbone motion promoted upon the addition of nano-fillers into latex particles. Our experimental findings suggested that film formation from MWCNT-added latex films with a broad particle size distribution mainly originates from void closure mechanism since Delta H for viscous flow suppresses Delta E-B acquired for backbone motion of repeating PS chains to a great extent.