Blend polyvinyl alcohol, PVOH

The main component of warp size is usually starch, polyvinyl alcohol (PVOH) or a blend of the two. Other size materials are sometimes used commercially to a lesser extent. These other, less often used types, include derivatized natural sizes and synthetic sizes listed in Table 7.12. In addition to the main size components... 

The complex formed by amylose with the complexing agent is usually crystalline, characterized by an amylose single helix around the complexing pol3mer [32]. Amylopectin does not interact with the complexing polymer, remaining in the amorphous phase. Starch can also be blended with polyvinyl alcohol (PVOH), for the production of foamed products, such as trays for food. Starch esters reinforced with natural fibers exhibit properties similar to those of polystyrene (PS). 

Blends of PHAs with polyvinyl alcohol (PVOH) have been attracting the attention of scientists. The two polymers are claimed to be compatible, even miscible. However, the scatter in the data presented in scientific literature may be caused by the fact that polyvinyl alcohol is in fact a copolymer of vinyl alcohol and vinyl acetate prepared from polyvinyl acetate by hydrolysis. The hydrolysis is rarely complete, so that... 

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