Polyfvinyl chloride blends

Choe, S., Cha, Y, Lee, H., Yonn, Y, and Choi, H. 1995. Miscibility of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and polyfvinyl chloride) blends. Polymer 36, 4977 982. 

Akutin (52) performed an exhaustive study on the influence of processing conditions and the nitrile rubber/poly(vinyl chloride) ratio on the mechanical characteristic of the product. The experiments were carried out in a Brabender Plastograph at 160-180° C and rotor speed of 10-50 rpm. The polyfvinyl chloride) molecular weight was 83500. A resin with an epoxy group content of 20.75% was added to the blend as plasticizer and stabilizer. Figure 29 shows that the... 

Polyfvinyl chloride)/poly(MMA-ran-butyl methacrylate) for 50/50 blends complete miscibility up to 190 C, immiscibility above 240 C, limited miscibility in between these temperatures [49]... 

Modulus-temperature behavior of amorphous polymers is also affected by admixture with plasticizers. These are the soluble diluents described briefly in Section 12.3.2. As shown in Fig. 11-11, the incorporation of a plasticizer reduces Tg and makes the polymer more flexible at any temperature above Tg. In polyfvinyl chloride), for example, T can be lowered from about 85°C for unplaslicized material to —30°C for blends of the polymer with 50 wt % of dioctyl phthalate plasticizer. A very wide range of mechanical properties can be achieved with this one polymer by variations in the type and concentration of plasticizers. 

Trosiplast Dynamit Nobel Polyfvinyl chloride) and blends... 

Polyfvinyl chloride) (PVC), which becomes rubbery after blending with sufficient of a suitable plasticizer. 

Nishio, Y. and John Manley, R.S. 1988. Cellulose-polyfvinyl alcohol) blends prepared from solutions inIVdV-dimethylacetamide-lithium chloride. Macromolecules 21 1270-1277. 

TG-DTA-MS has obvious synthetic polymer applications. TA-MS has been appHed to study the thermal behavior of homopolymers, copolymers, polymeric blends, composites, residual monomers, solvents, additives, and toxic degradation products. In the latter context, FICl evolution from heated polyfvinyl chloride) materials is readily quantified by TA-MS and such data are of major significance in the design of fire-resistant polymeric materials. Pyrotechnic materials have been studied by TA-MS. A complex sequence of thermal events relates to the decomposition of these materials involving interactions between the nitrocellulose, perchlorate, and metal components with periodic release of carbon dioxide and oxygen. Only by EGA is it possible to rationalize the thermal behavior of such materials. TA-FTIR has also been applied extensively to study the thermal characteristics of synthetic polymers... 

The broadening of the dielectric spectra for miscible polymer blends is not only observed for the PS/PVME system. This further demonstrated by Fig. 12.16 where the normalized dielectric loss is plotted for a blend poly(ethylene-co-vinyl acetate) (EVA70, 70 % vinyl acetate) with polyfvinyl chloride) (PVC). With increasing concentration of PVC in the blend, the loss peak systematically broadens in comparison to that of both components (Rellick and Runt 1988). 

Table 1. Characteristics of some commercial samples of PCL and polyfvinyl chloride) used in studies of PCL blends... 

When a plasticizer is blended into a polymer, the glass transition temperature (Tg) of the polymer decreases. The variation Tg for a mixture of polyfvinyl chloride) (PVC) and dioctyl phthalate... 

Hourston, D.J. and l.D. Hughes, Pol)mieric systems for acoustic damping - 1. Polyfvinyl chloride)-segmented polyether ester blends. Journal of Applied Polymer Science, 21(11) p. 3099.1977. 

The utility of the DSC for studying polymer-polymer miscibility has been demonstrated for poly(vinyl chloride)/nitrile rubber polyfvinyl methyl ether)/poly-styrene and poly(2,6-dimethyl 1,4-diphenylene oxide)/poly(styrene-co-chloro-styrene)It has also been particularly useful for measuring the melting point depressions of crystalline polymers in blends Mn order to calculate the interaction parameter as will be discussed later. 

C.M. Nunez, A.L. Andrady, R.K. Guo, J.N. Baskir, and D.R. Morgan, Mechanical Properties of Blends of PAMAM Dendrimers with Poly( vinyl chloride) and Polyfvinyl acetate), J. Polymer ScL, Part A - Polym. Chem., 36,2111-2117 (1998). 

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