Citation: YU Jianming. RELATION BETWEEN DYNAMIC LOSS MODULUS AND DIFFUSION COEFFICIENT IN A MODIFIED PET FIBER*[J]. Chinese Journal of Polymer Science, ;1994, 12(4): 366-371. shu

RELATION BETWEEN DYNAMIC LOSS MODULUS AND DIFFUSION COEFFICIENT IN A MODIFIED PET FIBER*

YU Jianming

Received Date: 24 May 1993

The mobility of polymer chain segments is shown to play a major role in the diffusion ofdisperse dyes in a copolymerization modified PET system, monoepoxy compoundCH3 (CH3),OCH2CH--CH2 modified PET. The rate of dye diffusion (diffusion coefficient D) hasbeen related to the time-dependent mechanical property, dynamic loss modulus E", which iscontrolled by the mobility of chain segments. In this modified copolyester system, the variance ofamount of modifier in the copolyester fibers causes the change in disperse dye diffusion coefficient to fiber,and in the dynamic loss modulus of the fibers,but the relationship between the diffusion and the dynamic loss modulus is in agreement with the theoretical relation derived by Bell and Dumbleton.The relation obtained in this paper is :LnD=-2.28LnE>′′+26.81.
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