With excellent comprehensive properties,
polylactic acid/poly(butylene
adipate-co-butylene terephthalate) (PLA/PBAT) blends
have found wide applications as degradable materials. During the processing
procedure, a third component compatibilizer is introduced to improve
the compatibility and mechanical properties of PLA/PBAT blends. In
this work, environmentally friendly epoxidized soybean oil (ESO) is
used for the compatibilization of PLA/PBAT blends through the chemical
reaction of ESO with terminated hydroxyl groups of the two phases.
Through the adjustment of the amounts of ESO, the compatibilization
effect on the properties of PLA/PBAT blends is studied. The compatibilization
mechanism of ESO was analyzed by Fourier transform infrared spectroscopy
and differential scanning calorimetry testing, and the results prove
that ESO could react with PLA and PBAT to form a chemical bonding
interface. The PLA/PBAT blends compatibilized with ESO demonstrated
a significant increase in tensile strength, elongation at break, and
notched impact strength.
We investigate the mechanical properties of Poly Vinyl Chloride (PVC)/ acrylnitrile-butadiene-styrene copolymer (ABS) composite material with an impact testing machine,a material testing machine and other accessory devices. The result shows that the mechanical properties of PVC/ABS composite are a function of composition, the addition of ABS improved the mechanical properties of PVC/ ABS composite,the impact strength and elongation at break rise significantly with increasing ABS content in PVC/ABS composite and appears maximum value,While the tensile strength and modulus almost decrease monotonously with increasing ABS content in PVC/ABS composite.
With the rapid development of electronic equipment and communication technology, the demand for polymer composites with high thermal conductivity and mechanical properties has increased significantly. However, its nondegradable polymer matrix will inevitably bring more and more serious environmental pollution. Therefore, it is urgent to develop biodegradable thermally conductive polymer composites. In this work, biodegradable poly(butylene adipate-coterephthalate) (PBAT) is used as the matrix material, and vacuum-assisted filtration technology is employed to prepare carbon nanotube (CNT) and cellulose nanocrystal (CNC) networks with high thermal conductivity. Then CNT-CNC/PBAT composites with high thermal conductivity and excellent mechanical properties are prepared by the ultrasonic-assisted forced infiltration method. Both experiment and simulation methods are used to systematically investigate the thermally conductive and dissipation performances of the CNT-CNC/PBAT composites. Above all, a simple alcoholysis reaction is applied to realize the separation of the PBAT matrix and functional fillers without destroying the conductive network skeleton, which makes it possible for the recycling of thermally conductive polymer composites.
K E Y W O R D Sforced infiltration, poly(butylene adipate-co-terephthalate) matrix, recyclable thermal interface material Chenglin Li, Yi Han, and Qingyuan Du contribute equally.
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