Cellulose weight

Substrate weight [g] Volume of 0.1 molA HCl for preb tment [mil Cellulose weight [g] Volume of suspension broth fLl... 

As far as biopolymers other than plain cellulose are concerned, grafting has been reported for crosslinked cellulose, oxidized cellulose, carboxymethylated cellulose, cellulose acetate and even for crosslinked derivatives. The grafted material content is usually given as the ratio of the increase in weight to the initial cellulose weight. 

CMC visa Swollen cellulose weight loss Ball-milled cotton weight loss Cotton swelling... 

Shorter residence times were obtained using a quartz insert to reduce the gas-phase reactor s apparent volume. Longer residence times were obtained by reducing the water flow rate and cellulose sample size proportionately. Thus, all the data represents the same steam flow/cellulose weight ratio. 

When 18 25% of the chemical, usually in finely divided powder form or polymeric liquid, is added to the viscose (on cellulose weight) the result is a fiber that, when woven into fabric, can pass the government s standard. The FR rayons have an advantage over FR cotton as the latter must be after treated and most of the flame-retardant remains on the surface of the fibers. FR rayons on the other hand have the agent distributed uniformly throughout the interior of the fiber. 

Interpret the slope and intercept values of the line in Fig. 10.12 in terms of the molecular weight and radius of gyration of cellulose nitrate in this solution. At 436 nm the refractive index of acetone is 1.359. 

Benoit et al.f prepared a mixture of two different fractions of cellulose nitrate and determined the molecular weight of the mixture by light scattering. The mixture was 25.8% by weight fraction A and 74.2% fraction B, where the individual fractions have the following properties ... 

Membrane Sep r tion. The separation of components ofhquid milk products can be accompHshed with semipermeable membranes by either ultrafiltration (qv) or hyperfiltration, also called reverse osmosis (qv) (30). With ultrafiltration (UF) the membrane selectively prevents the passage of large molecules such as protein. In reverse osmosis (RO) different small, low molecular weight molecules are separated. Both procedures require that pressure be maintained and that the energy needed is a cost item. The materials from which the membranes are made are similar for both processes and include cellulose acetate, poly(vinyl chloride), poly(vinyHdene diduoride), nylon, and polyamide (see AFembrane technology). Membranes are commonly used for the concentration of whey and milk for cheesemaking (31). For example, membranes with 100 and 200 p.m are used to obtain a 4 1 reduction of skimmed milk. 

Sodium carboxymethyl cellulose [9004-32-4] (CMC) and hydroxyethyl cellulose [9004-62-0] (HEC) are the ceUulosics most widely used in drilling fluids (43). CMC is manufactured by carboxymethylation of cellulose which changes the water-insoluble cellulose into the water-soluble CMC (44). Hydroxyethyl cellulose and carboxymethyl hydroxyethyl cellulose (CMHEC) are made by a similar process. The viscosity grade of the material is determined by the degree of substitution and the molecular weight of the finished product. 

Copolymers of diallyl dimethyl ammonium chloride [7398-69-8] with acrylamide have been used in electroconductive coatings (155). Copolymers with acrylamide made in activated aqueous persulfate solution have flocculating activity increasing with molecular weight (156). DADM ammonium chloride can be grafted with cellulose from concentrated aqueous solution catalysis is by ammonium persulfate (157). Diallyl didodecylammonium bromide [96499-24-0] has been used for preparation of polymerized vesicles (158). 

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