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The online version of this article (doi:10.1007/s00396-017-4050-8) contains supplementary material, which is available to authorized users.
1. The step-wise curing condition is determined based on the thermodynamic parameters of each simplex elastomer, which is 45 °C-3d then 60 °C-4d.
2. The network structure model is depicted combined extension test with dynamic mechanical analysis.
3. The IPN’s network could be obtained through the step-wise curing process, in which the P(EO-co-THF)/N100 domains act as crosslinking joints compared to GAP/N100 domains and eventually cause the constrained effect.
4. The blending elastomers have a promising application in military materials.
A series of glycidyl azide polymer (GAP) with hydroxyl-terminated poly(ethylene oxide-co-tetrahydrofuran) (P(EO-co-THF)) polymer networks of various functional molar ratios (R) and different GAP contents have been prepared through the step-wise curing process. The step-wise curing condition is determined based on the thermodynamic parameters of each simplex elastomer system, which is 45 °C-3d then 60 °C-4d. The mechanical properties of the elastomers have been improved from 1.88 to 2.11 MPa in WGAP = 50% under that condition, which is caused by the formation of the larger-sized mesh structure and in consequence the effective elastic strands increase. Meanwhile, the dynamic mechanical analysis (DMA) reveals that the glass transition temperatures of the elastomers are approximately −62.42 and −26.96 °C, respectively. Moreover, it can be concluded through DMA that the P(EO-co-THF) domains act as the main crosslinking joints compared with the GAP/N100 domains and thus cause the constrained effect. Combining extension test with DMA results, the network model of the elastomers is depicted. In addition, the thermal stabilities of the blending elastomers have also been studied, and their thermal stabilities meet the requirements of military materials.
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- Study on bulk preparation and properties of glycidyl azide polymer with hydroxyl-terminated polyether elastomers obtained through step-wise curing process
- Springer Berlin Heidelberg
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