The effect of the poly(acrylic acid) homopolymer [PAA] existing in poly(propylene-graft-acrylic acid) [PP-g-AA] on the morphology and rheological properties of a PP-g-AA and polystyrene [PS] blend with varying amounts of poly(styrene-ran-glycidyl methacrylate) [PSGMA] was investigated. Two different PP-g-AAs, one with PAA, [PP-g-AA(O)] and the other without PAA, [PP-g-AA(T)], were used. We have shown that when the amount of PS-GMA is increased, the dispersed domain size of PP-g-AA(O) in the PP-g-AA(O)/PS blend does not decrease, even when the amount of PS-GMA in the blend is as large as 25 wt%. Conversely, the dispersed domain size of PP-g-AA(T) in the PP-g-AA(T)/PS blend does decrease gradually and reaches a steady value. However, the reduction in the dispersed domain size (D r) for PP-gAA(T) in the PP-g-AA (T)/PS blend with PS-GMA was just 30%. Here, D r is defined by the dispersed domain size of the blend without PSGMA minus that with 15 wt% of PS-GMA divided by the former. The changes in rheological properties with the proportion of PS-GMA content in the PP-g-AA(T)/PS blend were different to those for the PP-g-AA(O)/PS blend, thus demonstrating that the presence of PAA significantly affects the rheological as well as the morphological blend properties.
Посилання на статтю:
Effect of the functional group inhomogeneity of an in situ reactive compatibilizer on the morphology and rheological properties of immiscible polymer blends / Jin Kon Kim, Dong Kee Yi, Hyun Kyoung Jeon, Chan Eon Park // Polymer. – 1999. – N 40. – P. 2737–2743.