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Modification of Nylon 6 by phenol-containing polymers

✍ Scribed by P. T. Huang; J. L. Lee; S. C. Chiu; T. K. Kwei; E. M. Pearce

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
127 KB
Volume
73
Category
Article
ISSN
0021-8995

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✦ Synopsis

A crystalline polymer, Nylon 6, was selectively blended with various amorphous polymers containing phenolic moieties. It was found that moisture absorption by the amide group in Nylon 6 could effectively be reduced by blending with p-Cl-novolac at ratios as low as 2 phr (part per hundred resin). Blends of Nylon 6 with vinylphenol homopolymer and its copolymer with styrene also showed reduced moisture uptakes, but the effect was less dramatic than that of the p-Cl-novolac blend at all blend ratios. Novolac content in excess of 5 phr shows little additional advantage in moisture reduction. Thermal transitions of blends of Nylon 6 with poly(vinyl phenol), its copolymer, and p-Cl-novolac were also investigated. At a blend ratio of 5 phr, p-Cl-novolac caused a larger increase in glass transition temperature than the other two blends. The melting temperatures of the blends were little influenced by low levels of the amorphous polymer incorporation, but broader melting endotherms in the differential scanning calorimetry scans were observed.

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