화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.12, No.3-4, 157-163, December, 2000
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Stress relaxation of ABS polymer melts : Effect of weight fraction of rubber particle
Kwang Soo Cho†, Joong-Hwan Choi, Sang Yong Kim, and Youngdon Kwon1
  • School of Material Science and Engineering, Seoul National University, Korea
  • 1School of Applied Chemistry and Chemical Enginering, Sungkyunkwan University, Korea
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We develop a simple model which can describe and explain abnormal stress relaxation of ABS melt for which stress dose not exponentially decay. The relaxation behavior of ABS melt consists of two distinct relaxation modes. One is the relaxation of the matrix phase similar to the case of homopolymer melt. The other is manifested by the collection of butadiene rubber particles, named as the cluster, where the particles are connected through the interaction between grafted SAN and matrix SAN. The second mode of the relaxation is characterized by the relaxation time, which is a function of the average size and the microscopic state of the cluster. Experimental results reveal that it can be represented as the product of the average size of the clusters by a function of internal variable that represents the fraction of strained SAN chains inside the cluster.
Keywords:ABS;Relaxation;Percolation
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