Premium
Anionic copolymers of octanelactam with laurolactam (nylon‐8/12)—IV. Dynamic thermomechanical and mechanical properties
Author(s) -
Arvanitoyannis Ioannis,
Kehayoglou Aristides H.,
Blanshard John M. V.
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990290208
Subject(s) - differential scanning calorimetry , glass transition , materials science , crystallinity , dynamic mechanical analysis , ultimate tensile strength , composite material , nylon 6 , elongation , modulus , melting point , young's modulus , polymer chemistry , polymer , thermodynamics , physics
Abstract The thermomechanical and the mechanical properties of a recent series of copolyamides of octanelactam (OL) and laurolactam (LL) (nylon‐8/nylon‐12) were studied. The glass transition temperature ( T g ) and melting point ( T m ) were determined with dynamic mechanical thermal analyser, and compared to those obtained with differential scanning calorimetry and the activation energy for glass transition was calculated. The copolyamides showed a minimum for tensile strength, yield stress, stress at 100% and modulus and a maximum for elongation at break at the composition 60/40 (OL/LL) which has the lowest crystallinity. Young's modulus against % elongation showed the classification of copolyamides in two groups (rich in OL or LL, respectively).