Optimization of Exothermic, Foaming, and Mechanical Properties of Modified Polyurethane as Filling Material for Goaf Sealing Wall

<div>The relationship between reaction temperature and time: (a) overall curves of reaction temperature; among them, the mass ratio of polyether triols and polyether tetraols of group I to group IV was 9 : 11, 10 : 10, 11 : 9, and 8 : 12, respectively; (b) magnified curves of reaction temperature.</div>

Advances in Materials Science and Engineering

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Figure 3

Figure 3: Optimization of Exothermic, Foaming, and Mechanical Properties of Modified Polyurethane as Filling Material for Goaf Sealing Wall 