Back to Search
Start Over
Hydrogen bonding and topological network effects on optimizing thermoplastic polyurethane/organic montmorillonite nanocomposite foam
- Source :
- Polymer. 212:123159
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Foaming behavior of thermoplastic polyurethane (TPU) is extremely difficult to be regulated due to the special microphase-separation structure. Therefore, organic montmorillonite (O-MMT) was applied in TPU foaming to regulate cell nucleation, growth and stabilization simultaneously: (1) strong interfacial interaction between O-MMT with TPU could not only facilitate O-MMTs’ nanoscale dispersion but also ensure a similar cell nucleation at various O-MMT loading, which effectively decoupled the complicated influences of cell nucleation and growth on TPU foam's shrinkage; (2) TPU/O-MMT topological network was constructed by O-MMT loading, regulating cell growth and corresponding decreasing cell size; (3) -OH group on O-MMT surface could hydrogen bond with TPU molecular chains in soft/hard segments, stabilizing TPU molecular chains and finally reducing foams' shrinkage. Combining hydrogen bonding and topological network resulted from O-MMT, it enables us to optimize TPU foam structure by controlling cell nucleation, growth and stabilization simultaneously, the optimal O-MMT loading was 1 wt%.
- Subjects :
- Materials science
Nanocomposite
Polymers and Plastics
Hydrogen bond
Organic Chemistry
Nucleation
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Topology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Thermoplastic polyurethane
Montmorillonite
chemistry
Materials Chemistry
0210 nano-technology
Dispersion (chemistry)
Nanoscopic scale
Shrinkage
Subjects
Details
- ISSN :
- 00323861
- Volume :
- 212
- Database :
- OpenAIRE
- Journal :
- Polymer
- Accession number :
- edsair.doi...........86dfae2841c1024170ef43b2b54deea4