Effect of oscillatory shear on the interfacial morphology of a reactive bilayer polymer system

Effect of Interfacial Reaction and Morphology on Rheological Properties of Reactive Bilayer

“…40 nm). This is consistent with our previous result 33 that j à j of the PS-mCOOH/PMMA-GMA bilayer after applying higher oscillatory frequency of 100 rad/s is smaller than that of the same bilayer without oscillatory shearing. It is noted that when a higher frequency was applied to this bilayer, the rms roughness of the interface decreased from ca.…”

“…The reaction between the carboxylic acid in PSmCOOH and the epoxy group in PMMA-GMA occurs easily at elevated temperatures, [26][27][28][29][30][31][32][33] giving rise to in situ formation of PMMA-graft-PS copolymers. We prepared the plates of PS-mCOOH, PMMA-GMA and PS homopolymer by using compression molding on Si-wafer to obtain smooth surfaces of the plates, and then annealed at 130 C for 24 h. The PS-mCOOH (or PS) plate was placed on the top of the PMMA-GMA plate.…”

“…The root-mean square (rms) roughness of the interface was calculated as given in our previous study. 33 …”

“…For this purpose, PMMA-graft-PS copolymers are produced by the reaction between PMMA-GMA and PS-mCOOH, as given in ref 33. To facilitate the floating the graft copolymer from silicon wafer, silicon oxide with $ 100 nm thickness was evaporated onto a silicon wafer.…”

Polymer Blend Compatibilization by Copolymers and Functional Polymers

“…As shown by Kim [76] for a bilayer of reactive PS-end carboxylic and PMMA-ran-epoxy, micro-emulsions could be observed in a shear flow under a shear rate of 100 s 1 after less than 50 min, while for static conditions they would form after 15 h [57]. In the case of melt blends prepared in internal mixers, micro-emulsions could be detected after less than 5 min of mixing, thus demon strating again the importance of flow [68].…”