Effect of reactivity of bisphenols on basic rules of low-temperature polyesterification View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1971-08

AUTHORS

S. V. Vinogradova, A. V. Vasil'ev, V. A. Vasnev, L. V. Dubrovina, V. V. Korshak

ABSTRACT

A study was made of the basic rules for the low-temperature polycondensation of the acid chloride of terephthalic acid with dichlorodian and dimethyldian, i.e., with bisphenols that differ in their acidity constants.Polyacrylates of higher molecular weight are obtained with increase in the acidity of the bisphenol, i.e., with increase in its reactivity.When the polycondensation is run in a medium which dissolves the polymer, the dependence of the molecular weight values of the polyacrylates on the reaction temperature has the shape of a curve with two maxima.When the polycondensation is run in a medium which does not dissolve the polymer in a wide temperature range, the value of the reduced viscosity of the polyacrylate remains constant. A study was made of the basic rules for the low-temperature polycondensation of the acid chloride of terephthalic acid with dichlorodian and dimethyldian, i.e., with bisphenols that differ in their acidity constants. Polyacrylates of higher molecular weight are obtained with increase in the acidity of the bisphenol, i.e., with increase in its reactivity. When the polycondensation is run in a medium which dissolves the polymer, the dependence of the molecular weight values of the polyacrylates on the reaction temperature has the shape of a curve with two maxima. When the polycondensation is run in a medium which does not dissolve the polymer in a wide temperature range, the value of the reduced viscosity of the polyacrylate remains constant. More... »

PAGES

1660-1663

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00860023

DOI

http://dx.doi.org/10.1007/bf00860023

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1029490983


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