Synthesis and Properties of New Polyarylates from 1,4-Bis(4-carboxyphenoxy)naphthyl or 2,6-Bis(4-carboxyphenoxy)naphthyl and Various Bisphenols
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
37
Journal Issue
5
Pages
645-652
Date Issued
1999
Author(s)
Chern, Y.-T.
Abstract
New 1,4-naphthyl and 2,6-naphthyl-containing polyarylates having inherent viscosities up to 1.28 dL/g were synthesized by the high-temperature solution polycondensation from the acid chloride of 1,4-bis(4-carboxyphenoxy)naphthyl or 2,6-bis(4-carboxyphenoxy)naphthyl and various bisphenols. Most of the resulting polyarylates showed amorphous characteristics and were readily soluble in common organic solvents such as N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), o-chlorophenol, and chloroform. Transparent, flexible, and colorless films of these polymers could be cast from the DMAc solutions. Their cast films had tensile strengths ranging from 54.9 to 84.2 MPa, elongations at break from 5.3% to 19.0%, and initial modulus from 2.0 to 2.8 GPa. These polymers had glass transition temperatures in the range of 172–280°C and began to lose weight around 400°C, with 10% weight loss being recorded at about 450°C in air. Dynamic mechanical analysis (DMA) reveals that the polyarylates containing isopropylidene linkages have three transitions on the temperature scale between −100 and 300°C. However, only two transitions were observed in the other polyarylates without isoproylidene linkage. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 645–652, 1999
SDGs
Type
journal article