Characterization of Phase Behavior in Polymer Blends by Light Scattering

Characterization of Phase Behavior in Polymer Blends by Light Scattering [Pg.159]

The pace of developing new molecules has not stopped, but it has slowed considerably as new chemistry is expensive and takes a long time to commercialize. Polymer blending or alloying has become an alternate route to new products and for problem-solving [3]. [Pg.159]

Improving mechanical properties such as toughness usually serve as the main reasons for the development of novel thermoplastic alloys and blends [4]. Other reasons for blending two or more polymers together include (i) to improve the polymer s processability, especially for the high-temperature polyaromatic thermoplastics (ii) to enhance the physical and mechanical properties of the blend, making them more desirable than those of the individual polymers in the blend and (iii) to meet the market force (cost dilution). Most products succeed because of a beneficial combination or balance of properties rather than because of any single characteristic. In addition, a material must have a favorable benefit-to-cost relation if it is to be selected over other materials for a particular application. One key technical issue is whether the blend will exhibit additive properties, or not. In many cases properties are well below additive, while in others they may be above additivity. The property relationships exhibited by blends depend critically on the correct control of their phase behavior [3]. [Pg.159]

Basically, polymer blends are divided into two large groups miscible on the molecular level and immiscible. Among commercial products based on miscible blends can be mentioned, for example, polystyrene (PS)- poly(phenylene oxide) (PPO), poly(vinylidene fluoride) (PVDF)-poly(methyl methacrylate) (PMMA), [Pg.159]

Characterization of Polymer Blends Miscibility, Morphology, and Interfaces, First Edition. [Pg.159]

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