Cellulose propionate blends

Chloropromazine (8—34 wt% loading) has been microencapsulated in PCL-cellulose propionate blends by the emulsion solvent evaporation method (61). Phase separation for some ratios of the two polymers was detectable by SEM. The release rate from microcapsules in the size range of 180-250 pm in vitro (Fig. 11) was directly proportional to the PCL content of the blend, the half-life (50% drug release)... 

The exceptional ability of PCL to form blends with many other polymers has stimulated a large amount of research. The subject has been reviewed a number of times (7,8). To date, the potential of such blends for drug delivery has been largely unexploited. The permeability of blends of PCL with cellulose propionate, cellulose... 

There have been many related works by other research groups that are concerned with the phase behavior, isothermal crystallization kinetics, and tensile properties of cellulose propionate (DS = 2.75)/PHB blends [129], the miscibility and crystallization behavior of CAB/PHB blends [ 130], or the melt... 

Cellulose esters such as cellulose acetobutyrate and cellulose propionate, which originally required plasticizers, are today blended with EVA and EVA graft polymer, respectively, to convert them into thermoplastic products (47). 

Phase behaviour and crystallisation kinetics for the binary blend P(3HB)/ cellulose propionate (CP) were studied by Maekawa and co-workers. A strong dependence of the measured Tg on composition was detected at high levels of CP. The Flory-Fox equation is one of the best equations to describe the dependence of Tg on composition in miscible blend systems. A good... 

Y. (2013) Blend miscibility of cellulose propionate with poly(N-vinyl pyrrolidone-co-methyl methacrylate). Carbohydrate Polym., 98 (1), 532-541. 

Sugimura, K., Katano, S., Teramoto, Y, and Nishio, Y. (2013) Cellulose propionate/poly(N-vinyl pyrrolidone-co-vinyl acetate) blends dependence of the miscibility on propionyl DS and copolymer composition. Cellulose, 20 (1), 239-252. 

Hybrid PV-distiUation processes intensification Polyimide (PI), cellophane, poly(vinyl alcohol) (PVA), cellulose diacetate (CDA), cellulose triacetate, two separate blends of cellulose acetate and CDA with cellulose acetate propionate, and PVA cross-linked with multifunctional cross-Unkers... 

Cellulose butyrate contains the bulkier butyryl group these esters are more compatible and soluble than acetates, but are too soft for most coating applications. Cellulose esterified with blends of alkyl groups can provide many intermediate properties needed in coatings. Selection of the appropriate cellulose acetate butyrate [9004-36-8] (CAB) and cellulose acetate propionate [9004-39-f] (CAP) content must be based on specific application requirements. 

Yamaguchi, M., and Masuzawa, K. (2007). Birefringence control for binary blends of cellulose acetate propionate and poly(vinyl acetate), Eur. Polvm. L 43. 3277-32R2. 

Buchanan, C.M., Boggs, C.N., Dorschel, D., Gardner, R.M., Komarek, R.J., Watterson, T.L., and White, A.W., 1995, Composting of miscible cellulose acetate propionate-aliphatic polyester blends, y. Environ. Polym. Degrad, 1-11. 

M. Yamaguchi, K. Masuzava, Transparent Polymer Blends Composed of Cellulose Acetate Propionate and Poly(epichlorohydrin), ResearchGate, 2013, (2013researchgate.net)... 

Phase behaviour and erystallisation kinetics for the binaiy blend P(3HB)/ eellulose propionate (CP) were performed by Maekawa et Cellulose aeetate butyrate (CAB), which has a combination of high (160 °C) and Tg (113 °C), is an important thermoplastic cellulose ester that can biodegrade in a natural environment. In an attempt to make the best use of degradable polyester P(3HB), Wang et al. blended P(3HB) with CAB and studied the relationship between the blend morphology and its physieal properties. 

According to the solubility parameters blends of NBR with cellulose acetate, propionate, or acetate butyrate should give a homogeneous phase. Owing to the formation of hydrogen-bridge bonds, however, the theory fails the polymer blends consist exclusively of two phases and they have no resistance to ozone, even when the fluxing has been carried out at temperatures of around 180°C. 

A wide range of resins used in medical devices were included in this study and are listed in Table 1. These included an ABS resin manufactured by BASE, a polycarbonate resin manufactured by Bayer Polymers, and a polymethyl methacrylate (PMMA) resin manufactured by Gyro. In addition, a series of medical polymers manufactured by Eastman Chemical Company were included in this study. These included a propionate cellulosic formulation, a copolyester/polycarbonate blend, a polyethylene terephthalate homopolymer (PET), and a series of Eastman Coplyesters. All four of the... 

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