Cellulose Acetate CCA

The most widely used applications reported in 1973 included rib structures in the fabrication of lightweight reinforced-plastic parts and as a core material in sandwich construction, bonded to metal, wood, or glass. Other applications are as reinforcements for aircraft-control surfaces, radome housings, fUler blocks under fuel cells, tank floats for indicating devices, and ribs, posts, and framing in houses and shelters. Due to its buoyancy characteristics cellulose acetate foam has been used in lifeboats, buoys, and other flotation devices (21). 

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Even though most plastics can be made into foamed products, from a practical and market oriented view only a few different types are used. A few of these plastics will be reviewed. As an example limited use has been made using cellular cellulose acetate (CCA). The CCA was one of the first rigid foams produced and was used rather extensively during the 1940s and 1950s mainly in aircraft sandwich constructions. 

Discussions on cross-linked vinyl foams, which are rigid, can be found below under Vinyl Foams, and rigid cellular cellulose acetate (CCA) foams and polysulfone foams are discussed in the section under Miscellaneous Foams. 

After the acetylation of cellulose, effective recycling of the solvent ILs is absolutely required. For example, at the end of the acetylation comhusk cellulose in the presence of the IL AmimCl, the comhusk cellulose acetates (CCA) product was precipitated with a large excess of water. The polymer was filtered off, and the residual IL in the filtrate was recovered by a simple evaporation, giving dean AmimCl. The purity of the recovered AmimCl was above 99%, confirmed by IH NMR sp>ectroscopy [Cao et al., 2007). 

CCA cellular cellulose acetate DGA differential gravimetric analysis... 

Cellulose acetate phthalate CCA PI Above pH 6 The high pH required for dissolution is a disadvantage. Forms brittle films, so must be combined with other polymers. 

CCA cellular cellulose acetate GFRP carbon fiber reinforced plastics... 

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