EFFECT OF PARTICLE SIZE ON THE FILMING PROCESS OF POLYSTYRENE LATEX STUDIED BY AFM

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EFFECT OF PARTICLE SIZE ON THE FILMING PROCESS OF POLYSTYRENE LATEX STUDIED BY AFM

Papers | Updated：2021-06-21

- EFFECT OF PARTICLE SIZE ON THE FILMING PROCESS OF POLYSTYRENE LATEX STUDIED BY AFM
- Vol. 20, Issue 6, Pages: 509-515(2002)
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- Published：20 December 2002
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EFFECT OF PARTICLE SIZE ON THE FILMING PROCESS OF POLYSTYRENE LATEX STUDIED BY AFM[J]. 2002, 20(6): 509-515.
DOI：

EFFECT OF PARTICLE SIZE ON THE FILMING PROCESS OF POLYSTYRENE LATEX STUDIED BY AFM[J]. 2002, 20(6): 509-515. DOI：

摘要

The film formation process of micro-PS particles (diameter 742 nm) and nano-PS particles (diameter 29 nm) wasstudied by atomic force microscopy and differential scanning calorimetry. During a step heating process

the particles wereannealed for 0.5 h at each selected temperature. It was found that the deformation and interdiffusion temperatures of themicro-PS particles are ca. 120-130℃ and 140-150℃

that of the nano-PS particles are 90℃ and 100-110℃ respectively.The DSC traces of nano-PS particles showed that there was an exothermic peak near Tg after annealing for 0.5 h at the selected temperatures below 90℃ ;otherwise

the exothermic peak disappeared after annealing at 100℃ or above.Compared with the micro-PS particles

the sintering process of nano-PS particles occurs at much lower temperature determined by the confined state of polymer chains with higher conformational energy in nano-particles

and completes in a much narrower temperature range driven mainly by the larger total surface energy.

Abstract

the particles wereannealed for 0.5 h at each selected temperature. It was found that the deformation and interdiffusion temperatures of themicro-PS particles are ca. 120-130℃ and 140-150℃

the exothermic peak disappeared after annealing at 100℃ or above.Compared with the micro-PS particles

the sintering process of nano-PS particles occurs at much lower temperature determined by the confined state of polymer chains with higher conformational energy in nano-particles

and completes in a much narrower temperature range driven mainly by the larger total surface energy.

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