z-logo
Premium
Synthesis, characterization, and properties of acrylate‐modified tung‐oil waterborne insulation varnish
Author(s) -
Ge Qing,
Wang Hualin,
She Yi,
Jiang Suwei,
Cao Mengye,
Zhai Linfeng,
Jiang Shaotong
Publication year - 2015
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.41608
Subject(s) - maleic anhydride , materials science , acrylate , composite material , curing (chemistry) , thermogravimetric analysis , differential scanning calorimetry , polymer chemistry , fourier transform infrared spectroscopy , chemical engineering , copolymer , polymer , thermodynamics , physics , engineering
An acrylate‐modified tung‐oil waterborne insulation varnish was synthesized from tung oil, maleic anhydride, and acrylates via a Diels–Alder reaction and free‐radical polymerization, and the varnish could be solidified at a relatively low temperature with blocked hexamethylene diisocyanate as a curing agent. The resulting films were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The insulation properties (electrical insulation strength, volume resistivity, and surface resistivity) of the varnish films were tested, and the resistances of films to salted water were evaluated. With an increase in the maleic anhydride content, the thermal stability of the film was improved, whereas the electrical insulation strength, volume resistivity, and surface resistivity decreased. The electrical insulation strength of the film after it was immersed in the NaCl solution was lower than that in dry state, and it decreased as the immersed time was prolonged. In particular, the electrical insulation strength loss of the film increased significantly at maleic anhydride contents beyond 25 wt %. Furthermore, the hardness of the film increased with increasing methyl methacrylate/ N ‐butyl acrylate ratio, whereas the flexibility and adhesion of film decreased to a certain degree at the same time. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41608.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here