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Monomer casting nylon‐6‐ b ‐polyether amine copolymers: Synthesis and antistatic property
Author(s) -
Xiang Meng,
Xu Sheng,
Li Chengjie,
Ye Lin
Publication year - 2016
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24310
Subject(s) - materials science , copolymer , antistatic agent , polymer chemistry , crystallinity , composite material , monomer , casting , nylon 6 , crystallization , isocyanate , polymerization , ultimate tensile strength , contact angle , polymer , chemical engineering , polyurethane , layer (electronics) , engineering
MC nylon‐6‐ b ‐polyether amine(PEA)copolymers were synthesized with macroinitiator based on amino‐terminated PEA functionalized with isocyanate via in situ polymerization. It was found that introduction of PEA delayed the polymerization process of caprolactam, resulting in the decrease of molecular weight of the copolymer. With increasing content of PEA, the melting peak started declining and widening, while the crystallinity and crystal grain size decreased, indicating weakening of the crystallization ability of nylon‐6 matrix. The fracture surfaces of the copolymer changed from irregular mosaic to the striation, presenting tough fracture characteristic, and the notched impact strength of the copolymers were improved dramatically. The electrical resistivity of the copolymers was increased by three orders of magnitude, and kept stable with prolonging storage time, indicating a permanently antistatic ability. The improved antistatic mechanism was deduced by the increase of concentration of oxygen atom and CO group on the surface of the copolymers with increasing PEA content. The water contact angle decreased and surface tension increased, and finally the hydrophilicity of the copolymers was enhanced, resulting in the fairly good antistatic behavior of the copolymers by absorbing moisture from air. POLYM. ENG. SCI., 56:817–828, 2016. © 2016 Society of Plastics Engineers