Reasonable design of phosphated polyvinyl alcohol grafted polyaniline

Scientists are committed to the rational design of phosphate polyethylene alcohol-branched polyphenylamines for high-performance water-based bio-based alcoholic acid nanocomposics.
phosphate polyethylene alcohol (PPVA) has been shown to be more effective in improving the dispersion stability of polyphenylamine (PANI). Phosphate groups can also improve corrosion resistance, but they can spatially interfere with PANI bridging to PPVA

.
, it is important to explore the degree of phosphateization and the balance between the thyching reaction and the properties of composite materials. Here, the PANI (EPPVA-g-PANI) dispersion of EPPVA branching is prepared by polymerizing aniline with different phosphate degrees (DP) chemically on chlorinated PPVA (EPPVA). It was found that DP has a considerable influence on microstructure, fluid behavior and compatibleness between EPA and PANI. For EPPVA-g-PANI-8.00%, enhanced interaction and compatibness are shown, resulting in an increase in stretch strength from 26.84 MPa to 38.62 MPa.
excellent long-term corrosion resistance
can be prepared EPPVA-g-PANI dispersions directly mixed with water-based alicic acid resin (WAR) without the need for complex reprocessing to prepare high-performance WAR/EPPVA-g-PANI nanocomposing materials. Compared to WAR, the impedance module of WAR /EPPVA-g-PANI increased from 8.81×10
4
to 3.03×
10
10.cm
2
, corrosion current density was reduced from 1.78×10
-6
A.cm to 3.02×10
-8
.
-2
. In addition, only one time constant was detected after 480 hours of immersion, which further demonstrates the excellent long-term corrosion resistance of WAR/EPPVA-g-PANI.
the study was published in March 2020 in volume 140 of Organic Coatings Progress.
.