화학공학소재연구정보센터
Polymer, Vol.41, No.2, 595-606, 2000
Copolymerization of 1,2 bis(2-methylpropenoyloxy)ethane and divinylbenzene in aqueous suspension. Part I: control of the diameters of the beads of 1,2 bis(2-methylpropenoyloxy)ethane-divinylbenzene copolymer
The aim of the current paper is to study the influence of the interfacial tension (sigma) and viscosity on the droplets dispersion of 1,2 bis(2-methylpropenoyloxy)ethane (EGDMA) and divinylbenzene (DVB). This dispersion is characterized by the distribution of poly(EGDMA-coDVB) polymer spheres. We experimentally observed that this distribution is polymodal and that the experimental maximum diameter (d(max))(obs) is proportional to (sigma/rho(c))(0.59) (rho(c) is the continuous phase density). This relation is valid when (d(max))(obs) much greater than eta, the Kolmogoroff turbulence microscale (which is related to the dissipated power by mass unit and the kinematic viscosity (nu(c)) of the continuous phase). When (d(max))(obs) much less than eta, the experimental maximum diameter is not proportional to (nu(c)sigma/rho(c))(1/3) ,but it verifies the theory of Taylor's viscous shear abrasion where the maximum diameter is proportional to sigma/[mu(c),(19p + 16)/(16p + 16)] (p = mu(d)/mu(c), mu(d) and mu(c), are the dynamic viscosity of the dispersed and continuous phase, respectively).