Dynamic Rheological Investigation during Curing of a Thermoset Polythiourethane System
Joint Authors
Du, Weiping
Tan, Lianjiang
Chen, Huifang
Zhang, Yang
Yang, Haipeng
Source
International Journal of Polymer Science
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-03-31
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
A polythiourethane thermoset system based on a diisocyanate and a trithiol was investigated by dynamic rheological measurements.
Strain sweep was performed to determine the linear elastic region of the thermosetting system.
The changes of characteristic parameters including elastic modulus, viscous modulus, and complex viscosity were recorded in a heating ramp to trace the cross-linking and structural evolution during the curing process.
Time sweep at constant temperatures was also performed to explore possible curing strategy at reduced temperatures.
In addition, frequency sweep was conducted to confirm the temperature- and time-dependent viscoelastic properties of the thermoset system during the curing process.
Both continuous heating and isothermal aging gave rise to solidification of the polythiourethane with similar critical structure, as evidenced by the critical values of relaxation exponent.
A combination of isothermal aging and heating is expected to be a facile strategy for fabricating thermoset polythiourethane polymers at lower temperature or/and reduced curing time.
A kinetic study was done to confirm the gelation characteristics of the polythiourethane system, and the activation energy was also calculated.
American Psychological Association (APA)
Du, Weiping& Tan, Lianjiang& Zhang, Yang& Yang, Haipeng& Chen, Huifang. 2019. Dynamic Rheological Investigation during Curing of a Thermoset Polythiourethane System. International Journal of Polymer Science،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1168306
Modern Language Association (MLA)
Du, Weiping…[et al.]. Dynamic Rheological Investigation during Curing of a Thermoset Polythiourethane System. International Journal of Polymer Science No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1168306
American Medical Association (AMA)
Du, Weiping& Tan, Lianjiang& Zhang, Yang& Yang, Haipeng& Chen, Huifang. Dynamic Rheological Investigation during Curing of a Thermoset Polythiourethane System. International Journal of Polymer Science. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1168306
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168306