Effect of Modified Cardanol as Secondary
Plasticizer on Thermal and Mechanical Properties of Soft Polyvinyl
Chloride
Posted on 2020-07-08 - 18:11
This
study represents the first attempt to prepare a novel cardanol-based
plasticizer. Modified cardanol (MC, i.e., phosphorylated cardanol)
containing nitrogen and phosphoric acid groups was synthesized and
then incorporated into polyvinyl chloride (PVC) as the secondary plasticizer
for partial substitution of dioctyl phthalate (DOP). The molecular
structure of MC was characterized by Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance (NMR), and 31P NMR
spectroscopy. The thermal degradation behavior, mechanical performance,
and compatibility of MC were also investigated. The substitution of
DOP with MC enables PVC blends to have higher thermal stability, tensile
strength, and leaching resistance. The tensile strength is increased
from 17.7 MPa for DOP/PVC blend (MC-0) to 25.7 MPa for MC/PVC blend
(MC-4), and the elongation at break is increased from 256 to 432%,
respectively. The microstructure of the tensile fractured surface
was studied by scanning electron microscopy. The results show that
the addition of MC allows PVC blends to have well-balanced properties
of flexibility and strength and excellent migration resistance.
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Ali, Muhammad; Lu, Yunhua; Ahmed, Saad; Khanal, Santosh; Xu, Shiai (1753). Effect of Modified Cardanol as Secondary
Plasticizer on Thermal and Mechanical Properties of Soft Polyvinyl
Chloride. ACS Publications. Collection. https://doi.org/10.1021/acsomega.0c00826