Current time in Korea 14:33 Dec 01 (Tue) Year 2020 KCS KCS Publications
KCS Publications
My Journal  Log In  Register
HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 2, Number 4
BKCSDE 2(4)
April 20, 1981 

 
Title
Rheological Properties of Polystyrene Degraded by Mechanical Forces
Author
In Joon Oh, Taikyue Ree
Keywords
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 η with 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 x2/α2,β2 and x1β1/α1 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.
Page
129 - 132
Full Text
PDF