Journal article
The effect of pyrolysis on the chemical, thermal and rheological properties of pitch
Soft matter, v 17(39), pp 8925-8936
13 Oct 2021
PMID: 34546280
Abstract
Pitch-based carbon fibers are of considerable interest as high-performance materials. There are reports over the last several decades detailing (i) methods of improving pitch-based carbon fiber performance, and (ii) reducing the cost of production via novel processing techniques. However, there remain considerable challenges in producing high-performance pitch-based carbon fibers consistently on an industrial scale. This is arguably due to the difficulty of scaling the melt-spinning process to compensate for variability in pitch feedstock quality and a lack of understanding of processing-structure-performance relationships. This work focuses on the early stages of heat treatment (pyrolysis) of isotropic pitch and its effect on the chemical, thermal, and rheological properties of the pitch, which help determine its processability. More specifically, we quantify significant changes in chemical structure, M-w, T-g, T-s, and shear and extensional rheology as a function of pyrolysis time at 400 degrees C. The extensional rheology, in particular, shows that the 'stretchability' of the pitch samples strongly depends on pyrolysis severity, and is important for characterizing 'drawability'. Using a novel analysis of the uniaxial stretching kinematics, we show an isothermal 'drawability window' that allows for the largest axial and radial Hencky strains at constant rate. We hypothesize that this extensional drawability window could facilitate the successful processing of pitch into high quality fiber, minimizing the trial-and-error approach currently used in the field.
Metrics
Details
- Title
- The effect of pyrolysis on the chemical, thermal and rheological properties of pitch
- Creators
- Heedong Yoon - Drexel UniversityZachary R. Hinton - Drexel UniversityJames Heinzman - Drexel UniversityClarence E. Chase - ExxonMobilManesh Gopinadhan - ExxonMobilKazem Edmond - ExxonMobilDaniel J. Ryan - ExxonMobilStuart E. Smith - ExxonMobilNicolas J. Alvarez - Drexel University
- Publication Details
- Soft matter, v 17(39), pp 8925-8936
- Publisher
- Royal Soc Chemistry
- Number of pages
- 12
- Grant note
- ExxonMobil; Exxon Mobil Corporation
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000697524500001
- Scopus ID
- 2-s2.0-85117164949
- Other Identifier
- 991019168036304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Physics, Multidisciplinary
- Polymer Science