Journal
ACS APPLIED POLYMER MATERIALS
Volume 3, Issue 11, Pages 6019-6025Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.1c01329
Keywords
block copolymer; porous carbon fiber; polymer composite; rubber; carbon black; interface
Funding
- Ford Motor Company through the Virginia Tech-Ford Alliance
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This study prepared porous carbon fiber (PCF) filler from PAN-b-PMMA block copolymers by tailoring internal porous structures and surface chemistry, enhancing filler-matrix interactions. PCF was uniformly dispersed in rubber, significantly improving the mechanical properties of the composite materials.
Nanosized particles have a large surface area to facilitate interfacial contact and thus are promising fillers for polymers. However, poor dispersion of nanoparticles limits the reinforcement effect. Herein, by rationally tailoring the internal porous structures, specific surface area, and surface chemistry, we prepared porous carbon fiber (PCF) filler from poly(acrylonitrile-block-methyl methacrylate) (PAN-b-PMMA) block copolymers. PCF had a three-dimensional porous network and provided improved filler-matrix interactions. Owing to the enhanced filler-matrix interlocking, large interfacial contact area, and strong interfacial affinity induced by nitrogen and oxygen doping, PCF was uniformly dispersed in rubber. Uncured nature rubber composites containing 5 parts of PCF per hundred parts of rubber (phr) showed 4.3 times higher Young's modulus and twice the tensile strength at 300% strain compared to the neat rubber. PCF represents an effective reinforcing filler for polymers.
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