Dilute solution viscometry study on the miscibility of N,O-carboxymethyl chitosan-cellulose acetate blends
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Alka G. Boricha
Abstract
Dilute solution viscometry method is used for studying viscosity behavior of newly prepared N,O-carboxymethyl chitosan (NOCC), cellulose acetate (CA), and their blends at different compositions (0/10, 2/8, 4/6, 5/5, 6/4, 8/2, 10/0). In this method, reduced viscosity (ηsp/c) and inherent viscosity (ln ηrel/c) of the given polymer sample have been determined by measuring the flow time of the polymer sample in acetone solvent. Huggins (k) and Kraemer coefficients (k′) for given polymer-solvent system are calculated from the extrapolation of plots (ηsp/c) versus(c) and (ln ηrel/c) versus(c). The miscibility of this polymer system is determined using different criteria such as Δb, Δb′, 
, interaction parameter Δ[η], thermodynamic parameter α, and modified thermodynamic parameter β. Based on the positive or negative sign of this criteria, miscibility of the polymer system is investigated. The results of the dilute solution viscometry method suggested that the NOCC/CA blends are miscible at the compositions range of 4/6, 5/5, 6/4, and 8/2 and completely immiscible at the 2/8 composition. The results are also supported by Fourier transform infrared analyses of all the compositions.
©2011 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Original Articles
- Fabrication and characterization of organic semiconductor for electromagnetic interference shielding material
- Processing and characterization of poly(ethylene oxide)/clay nanocomposites
- Organic solar cells using a multilayer structure MoO3/Ag/MoO3 as anode
- Dilute solution viscometry study on the miscibility of N,O-carboxymethyl chitosan-cellulose acetate blends
- Determination of relevant “average” properties for tubular filler materials used in composites
- Impact behaviour of thermoplastics — materials testing and simulationa
- Foam injection moulding – specific adjustment of foam structure and mechanical propertiesa
- Metal injection molding of W-Ni-Fe microcutters
- Synthesis, modification, and characterization of organosilicone and acrylate copolymer latex
- Synthesis and properties of random polysulfone/polyethersulfone copolymers as high-performance polymers
- Electron beam modification of space durable polymeric nano-adhesive bonding of ultra-high temperature resistant polymer
