Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Rheological Properties of Polystyrene Degraded by Mechanical Forces

  • Oh, In-Joon (Department of Chemistry Korea Advanced Institute of Science and Technology) ;
  • Ree, Taik-Yue (Department of Chemistry Korea Advanced Institute of Science and Technology)
  • Published : 19811200
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Abstract

Polystyrene was degraded by using a vibrating ball mill. The viscosities and molecular weights of the degraded products were measured, and the decrease of viscosity $[\eta}$ with ${\dot{s}}$ (rate of shear) observed for the degraded products were analyzed by applying the Ree-Eyring equation for viscous flow. The variation of the parameters $x_2$/{\alhpa}_2,{\beta}_2$ and $x_1{\beta}_1/{\alpha}_1$ in the equation were explained by the fracture of polymer molecules by mechanical force. The electron paramagnetic resonance spectrum of the degraded sample was taken, and it was confirmed that free radicals were produced by the chain-scission of polystyrene.

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  1. Mechanochemical tuning of molecular weight distribution of styrene homopolymers as postpolymerization modification in solvent‐free solid‐state vol.138, pp.1, 1981, https://doi.org/10.1002/app.49628