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Evaluation of structural change during fast transformation process of cross-linked NR into liquid NR by light pyrolysis
Abstract
The presence of cross-linked networks in rubber creates a tremendous problem for recycling and reusing of waste rubber. Fast transformation of cross-linked natural rubber (NR) into liquid natural rubber was carried out by light pyrolysis in temperature range from 240 to 300 °C in variable time (in range: 1–30 min). The transformation efficiency was evaluated by measuring the sol fraction and the cross-link density of the gel fraction. Over 80 wt% sol fraction was obtained at 280 °C in 15 min and 100 wt% sol fraction was obtained at 300 °C in 3 min. The chemical structure of sol fraction was characterized by gel permeation chromatography, nuclear magnetic resonance and infrared spectroscopy. The molecular weight of sol fraction in cross-linked NR processed at 280 °C and 300 °C decreased when gel fraction is over 50%. The nuclear magnetic resonance results showed that mono-sulfidic linkages occurred mainly in the sol fraction of liquid NR obtained at 300 °C. Isomerization from cis to trans form of isoprene unit in NR increased with extending pyrolysis time.
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Authors (4)
-
Xiaoyu Wu
- Shanghai Jiao Tong University Department of Polymer Science and Engineering
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Raqiqa Rasool
- Shanghai Jiao Tong University Department of Polymer Science and Engineering
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Shifeng Wang
- Shanghai Jiao Tong University Department of Polymer Science and Engineering
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
POLYMER DEGRADATION AND STABILITY
no. 136,
pages 48 - 57,
ISSN: 0141-3910 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Wu X., Formela K., Rasool R., Wang S.: Evaluation of structural change during fast transformation process of cross-linked NR into liquid NR by light pyrolysis// POLYMER DEGRADATION AND STABILITY. -Vol. 136, (2017), s.48-57
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.polymdegradstab.2016.12.009
- Verified by:
- Gdańsk University of Technology
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