Poly-Q -methylstyrene

Star terpolymers of the ABC2, ABC4 and AB2C2 were synthesized, where A, B and C are PS, PI and poly(Q -methylstyrene)(PaMeS), respectively. As an example, the reactions used for the synthesis of one of the most complex star architectures, (PS)(PI)2(P(zMeS)2, are given in Scheme 96. 

Graduate Research Assistant, Department of Materials Science and Engineering, North Carolina State University, Raleigh Poly(Q-methylstyrene)... 

In the case of the block copolymers of polystyrene-Woci -poly(Q -methylstyrene), each molecule contained one butyl group, one hydrogen and a Ag ion acquired during... 

Figure 12.26 Low-shear viscosity of (a) 3-arm poly-a-methylstyrene star polymers with molecular weights 0.87 (filled points) and 3.57 (open points) MDa in a-chloronaphthalene (good solvent, Q) and n-undecylanisitate (Theta solvent, ), using results of Kajiura, et al.(55), and (b) (left to right) 255 g/1 linear, 4-arm, and 6-arm polystyrenes in diethylbenzene at 30°C, based on findings of Utracki and Roovers(56).

Figure 12.27 Low-shear viscosity of (a) polymethylmethacrylate in good solvents DMF(D) and THF(O), and the Theta solvent water dioxane (0), using results from Gold, et al. (57), and (b) 1.65 (0.0) and 0.44 ( ) MDa poly-a-methylstyrene in n-butylbenzylphthalate (Theta solvent 0, ) and a-chloronaphthalene (good solvent Q), using data of Isono and Nagasawa (58).

For shear thinning curves the prefactor t]q and scaling prefactor a are similarly correlated. Figure 13.42 plots a against rjo for poly-a-methylstyrenes, polyiso-prenes, and polystyrenes studied by various authors. The solid lines represent power-law fits. For polystyrenes, on ignoring the two outlier points one has a for X 0.9 for the other polymers x is very nearly 2/3. From this figure, with poly-a-methylstyrenes and polyisoprenes for t] k) one may, in the lower-shear region, write the relationship... 

Figure 7.9 Small-angle neutron scattering experiments of polymer blends of polystyrene (PS) and poly(methylstyrene) (PMS) showing the agreement with the RPA-result /" (< ) linear in q. The inset shows schematically the phase diagram, which for the PS/PMS system...

Li, R, Xu, J., Wang, Q., and Wu, C. 2000. Surface functionalization of polymer latex particles 4. Taylor-making of aldehyde-fimctional poly(methylstyrene) latexes in an emulsifier-free system. Langmuir 16 4141-7. 

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