Abstract
Dynamic viscoelastic behavior of molten ABS polymers in which dispersed rubber particles are narrow in size distribution and hardly agglomerate were investigated as a function of the rubber content and the rubber particle size over wide ranges of temperature and frequency. The relaxation of the matrix AS copolymer associated with chain entanglement shifted the relaxation spectra of ABS to a longer time in proportion to the volume fraction of the dispersed phase. On the other hand, the long time relaxation spectra associated with particle-particle interactions depended strongly on both rubber content and particle size. With an increase in the rubber content and also a decrease in the rubber particle size, the spectra became higher. This may be explained as a result of a decrease in the surface distance between neighboring rubber particles.
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