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Modification of nylon‐6 with semi‐rigid poly( p ‐diphenylmethyl terephthalamide) using MDI as a chain extender
Author(s) -
Lin MingFung,
Shu YaoChi
Publication year - 1994
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.1994.070530106
Subject(s) - differential scanning calorimetry , extender , copolymer , materials science , polymer chemistry , melting point , homogeneous , composite material , chemical engineering , polyurethane , polymer , thermodynamics , physics , engineering
The purpose of this study is to reinforce the flexible nylon‐6 by using Poly( p ‐diphenylmethyl terephthalamide) (PMA) using MDI as a chain extender. Observation by scanning election microscopy showed that the multiblock copolymer had a homogeneous texture. From the differential scanning calorimetry measurements, the multiblock copolymers were shown to have only one melting point, Tm, which is higher than that of nylon‐6. The wide‐angle X‐ray diffraction pattern shows that nylon‐6 has two diffraction peaks at 2θ = 20° and 23.8°. However, the multiblock copolymer has only one peak at 2θ = 20°, indicating a different crystal structure of multiblock copolymers. The copolymers appears to have a significant reinforcing effect on the mechanical properties. © 1994 John Wiley & Sons, Inc.