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The compatibilizing effect of styrene-methyl methacrylate block copolymer (SM) on blends of poly(2,6-dimethyl-l,4-phenylene ether) (PPE) and poly(hydroxy ether of bisphenol A) (Phenoxy) was examined in terms of phase structure and rheological and mechanical properties. Scanning electron micrographs show that the blends exhibit a more regular and finer dispersion when a small amount of the SM block copolymer is added. The interfacial tension between two immiscible polymers in the blends is estimated by applying various theories of emulsion models to the results of theological measurements. The interfacial tension is significantly reduced when 5 wt % of the copolymer is added. Thermal analysis suggests that the added block copolymer is located at the interface of the PPE and Phenoxy. The blends exhibit remarkably enhanced toughness with the addition of a small amount of SM, which seems to be attributable to both dispersed particle size reduction and improved interfacial adhesion.

Посилання на статтю:

The effect of a styrene-methyl methacrylate block copolymer on the morphological, rheological and mechanical properties of poly(2,6-dimethyl-l,4- phenylene ether) (PPE) and poly(hydroxy ether of bisphenol A) (Phenoxy) blends / Ho Cheol Kim, Kie Hyun Nam and Won Ho Jo* // Polymer. – 1993. – Vol 34. – P. 4043-4051.

The effect of a styrene-methyl methacrylate block copolymer on the morphological, rheological and mechanical properties of poly(2,6-dimethyl-l,4- phenylene ether) (PPE) and poly(hydroxy ether of bisphenol A) (Phenoxy) blends - Завантажити.