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Extending the working life of toluene diisocyanate-based polyurethanes

Journal Article · · Journal of Applied Polymer Science
DOI:https://doi.org/10.1002/app.47865· OSTI ID:1597336
 [1];  [1];  [1];  [2];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Gyeongnam National Univ. of Science and Technology, Jinju‐si (Korea)
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This work demonstrates that the addition of tridecanoic acid to a toluene diisocyante (TDI)–based polyurethane considerable increases its working life. Formulations with the additive exhibited little changes in chemistry, glass–transition temperatures, and thermal stability as determined by Fourier transform infrared spectroscopy, rheology studies, nuclear magnetic resonance, solvent swelling tests, and thermal analyses. There was a slight increase in toughness of the additive formulation associated with an increase in engineering strain and a decrease in peak engineering stress. Molecular dynamics simulations indicated that the acid forms hydrogen bonding with the OH groups from the diols, slowing down the polymerization. Lastly, these studies demonstrate that tridecanoic acid can be used to extend working time of a TDI–based polyurethane with minimal changes to physical and chemical properties when compared to the pristine polyurethane.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Research Foundation of Korea; Ministry of Science, ICT, & Future Planning
Grant/Contract Number:
89233218CNA000001; AC52-06NA25396
OSTI ID:
1597336
Report Number(s):
LA-UR--18-30981; LA-UR--18-28149
Journal Information:
Journal of Applied Polymer Science, Journal Name: Journal of Applied Polymer Science Journal Issue: 33 Vol. 136; ISSN 0021-8995
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (10)

Figure 1(p. 8)figure Figure 1
Figure 2(p. 9)figure Figure 2
Figure 3(p. 11)figure Figure 3
Figure 4(p. 12)figure Figure 4
Table 1(p. 13)table Table 1
Figure 5(p. 14)figure Figure 5
Figure 6(p. 15)figure Figure 6
Figure 7(p. 16)figure Figure 7
Table 2(p. 16)table Table 2
Table 3(p. 17)table Table 3

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
applications
crosslinking
polyurethane
rheology
structure–property relationships