polyurethane networks
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Author(s):  
Jinshi Han ◽  
Yawei Zhou ◽  
Guanghang Bai ◽  
Wei Wei ◽  
Xiaoya Liu ◽  
...  

Thermoset polyurethanes have been applied in various fields by virtue of their outstanding properties. However, the thermosets can not be recycled due to their permanent crosslinking structure, which exerted detrimental...


Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3538
Author(s):  
Jiawei Li ◽  
Weiming Yang ◽  
Zhao Ning ◽  
Bin Yang ◽  
Yanning Zeng

Rosin is an abundant natural product. In this paper, for the first time, a rosin derivative is employed as a monomer for the preparation of polyurethane vitrimers with improved properties. A novel rosin-based polyurethane vitrimers network was constructed by the reaction between isocyanates (HDI) as curing agent and monomers with alcohol groups modified from rosin. The dynamic rosin-based polyurethane vitrimers were characterized by FTIR and dynamic mechanical analysis. The obtained rosin-based polyurethane vitrimers possessed superior mechanical properties. Due to the dynamic urethane linkages, the network topologies of rosin-based polyurethane vitrimers could be altered, contributing self-healing and reprocessing abilities. Besides, we investigated the effects of healing time and temperature on the self-healing performance. Moreover, through a hot press, pulverized samples of 70%VPUOH could be reshaped several times, and the mechanical properties of the recycled samples were restored, with tensile strength being even higher than the of that of the original samples.


2021 ◽  
Vol 158 ◽  
pp. 106358
Author(s):  
Abolfazl Golmohammadian Tehrani ◽  
Hesam Makki ◽  
S. Reza Ghaffarian Anbaran ◽  
Helma Vakili ◽  
Hassan Ghermezcheshme ◽  
...  

2021 ◽  
Author(s):  
Adithya Rangamani ◽  
Christopher A. Alabi

Monomer composition, geometry, cross-link density, and cross-link distribution are the primary determinants of material properties in thermosetting networks.


2021 ◽  
Author(s):  
Adithya Rangamani ◽  
Christopher A. Alabi

Correction for ‘Effect of backbone and end-group regioisomerism on thermomechanical properties of vanillin-based polyurethane networks’ by Adithya Rangamani et al., Polym. Chem., 2021, DOI: 10.1039/d0py01578d.


2020 ◽  
Author(s):  
Ivan S. Stefanović ◽  
Jasna V. Džunuzović ◽  
Enis S. Džunuzović ◽  
Aleksandra Dapčević ◽  
Sanja I. Šešlija ◽  
...  

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