New Stabilizers for Poly(vinyl chloride) Derived from 1,1 -Bis (4-aminophenyl) -4-Phenyl Cyclohexane Compounds[II]

Abstract

This article included the photostabilization study for poly(vinyl chloride)) by using newly stabilizers derived from [1,1 -Bis (4-aminophenyl)-4-Phenyl Cyclohexane] as additives against photodegradation. For that purpose, many samples (films) has been prepared by adding additives to the poly(vinyl chloride) with different weight percentages from additives and by different thickness. The photostabilization activities of these compounds were determined by detecting the carbonyl group (The position off carbonyl absorption is specified at 1724-1770 cm -1 ) with irradiation time. The absorption spectra of poly vinyl chloride films were followed using Shimadzu Spectrophotometer Also, change the viscosity of the averagee molecular weight and the degree of deterioration (α) and the average number of chain scission (s) was studied .We found through results that the rate of photostabilization in the presences of additives follows the following trend:-C4 > C3 > C2 > C1 > PVC UV absorption peroxide decomposer, for mechanisms haven been suggested according to experimental results obtained.

A novel method for long‐term preserving of urine microstructure using poly(vinyl chloride)

“…The viscosity property was used to determine the molecular weight of the polymer, using the Mark‐Houwink relation () 29,30 : where, [ η ] = intrinsic viscosity. K and α are constants for a given polymer–solvent–temperature system.…”

“…The relative viscosity ( η rel ) was determined by the ratio t / t o ( t is the flow time of the polymer solution and the flow time of the pure solvent, respectively) at 30°C. The viscometer reading was used to calculate the intrinsic viscosities according to the following relationships (2–4) 29,31,32 : where c is the polymer concentration (3 g/dL).…”

“…The viscosity property was used to determine the molecular weight of the polymer, using the Mark-Houwink relation (1) 29,30 :…”

“…The relative viscosity (η rel ) was determined by the ratio t/t o (t is the flow time of the polymer solution and the flow time of the pure solvent, respectively) at 30 C. The viscometer reading was used to calculate the intrinsic viscosities according to the following relationships (2-4) 29,31,32 :…”

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“…Through the viscosity measurement of the solution, the measurement of molecular weight is obtainable. The viscosity approaches are quite popular due to the fact that they are experimentally simple [34]. Then, (Mv) was measured Benzene was used as a solvent at 25°C, the plot indicated the (Mv) rapid decrease initially and after that, it decreased gradually suggesting it as a result of the main chain scission at various locations along the polymer chain.…”