서지주요정보
비상용성 고분자 블렌드의 복잡한 계면의 거동에 관한 연구 = Dynamics of complex interface in two immiscible polymer blends
서명 / 저자 비상용성 고분자 블렌드의 복잡한 계면의 거동에 관한 연구 = Dynamics of complex interface in two immiscible polymer blends / 이향목.
저자명 이향목 ; Lee, Hyang-Mok
발행사항 [대전 : 한국과학기술원, 1992].
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소장정보

등록번호

8003027

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 92033

SMS전송

도서상태

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초록정보

When a concentrated mixture of two immiscible fluid is sheared, a rather complex interface is formed due to the coagulation, rupture and deformation of droplets. Instead of formulating a droplet problem, Doi(1989) just forcused on the interface itself and derived a phenomenological constitutive equations which can describe the time evolution of the interfacial area(Q) and orientation($q_{ij}$) of the interface in the flow field. He restricted himself to a mixture of two immiscible fluids having same viscosity and density, mixed with the volume ratio 1:1. Here we are going to raise other questions on steady state structure of the interface with a finite but small flow field. Physically we can imagine that there should be a kind of steady structure of interface due to the competetion between flow and surface tension. But this theory failed to give nontrivial Q and $q_{ij}$ in the limit of dilute situation. It can be easily found that there is a certain term is missing in his phenomenological relaxation about the interfacial area when he wrote down. $(\partial/\partial t)Q\mid_{relax} = -C_1(\Gamma Q/\mu_o)Q$ Here $\Gamma$ is the surface tension and $\mu_0$ is the viscosity. We proposed $-C_3(\Gamma/\mu_0)q_{ij}q_{ij}$ term from the contribution of surface tension on relaxation of the interfacial area in the first place. $C_1$term is related to the coagulation of droplets in concentrated system, which is going to vanish at the limit of dilution. Therefore $C_1$ can be treated as a function of volume fraction phenomenologically. On the other hand, $C_3$ is the basic term which describes the deformation to the spherical form due to the surface tension and also it contains some contribution from rupture of an elongated droplet. When compared with calculation and with experiments in polymer blending system (PS/LLDPE) our theoretical analysis generally was valid although, in our cases, the agreement is only qualitative.

서지기타정보

서지기타정보
청구기호 {MCE 92033
형태사항 xii, 63 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, Summary of some experimental and theoretical work on drop deformation. - B, Determination of shear rate in the cone and plate geometry
저자명의 영문표기 : Hyang-Mok Lee
지도교수의 한글표기 : 박오옥
지도교수의 영문표기 : O-Ok Park
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 59-63
주제 Interface.
고분자. --과학기술용어시소러스
계면. --과학기술용어시소러스
Polymers.
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