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Segmented block copolyetheramides based on nylon 6 and polyoxypropylene. II. Structure and properties
Author(s) -
Yu Yeong Chool,
Jo Won Ho
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070560803
Subject(s) - nylon 6 , materials science , differential scanning calorimetry , copolymer , amorphous solid , ultimate tensile strength , phase (matter) , polymer chemistry , composite material , elongation , polymer , crystallography , chemistry , organic chemistry , physics , thermodynamics
Structure–property relationships of segmented block copolyetheramides based on nylon 6 and polyoxypropylene (POP) were investigated as a function of the compositions and block lengths of the hard and soft segments by using differential scanning calorimetry, dynamic mechanical analysis, FT‐IR spectroscopy, wide angle x‐ray diffractometry (WAXD), and tensile testing. The nylon 6–D4 copolymers with the shortest soft segment exhibited the two‐phase structure of a crystalline nylon 6 phase and an amorphous phase composed of the hard and soft segments. Also they showed the tensile properties characteristic of a plasticized thermoplastic. On the other hand, the nylon 6–D20 and nylon 6–D40 copolymers exhibited the three‐phase structure of a crystalline nylon 6 phase, an amorphous nylon 6‐rich phase, and an amorphous POP‐rich phase. The nylon 6–D20 copolymers had better elastic properties with the increase of soft segment content; however, the nylon 6–D40 copolymers with the longest soft segment showed a substantial reduction of the elongation at break due to lack of the crosslinking density. © 1995 John Wiley & Sons, Inc.