Abstract: Disclosed herein are polyurethane foams which can be used for reducing or preventing the corrosion of polymeric materials, which can be produced by mixing components (a) at least one polyisocyanate, (b) at least one compound having at least two groups reactive toward isocyanates, (c) optionally chain extender and/or crosslinking agent, (d) blowing agent, (e) catalyst, (f) optionally auxiliaries and additives, and (g) at least one anhydride to give a reaction mixture, and curing said reaction mixture to give the polyurethane foams, where the anhydride is added in an amount of 0.05-5 wt %, based on the weight of component (a). Also disclosed herein are a method of reducing or preventing the corrosion of polymeric materials by using such polyurethane foams and a method of using the polyurethane foams in certain applications, for example, in automotive interiors.

Abstract: A system and a method evaluate the effect of proactive utilization of a spatial stress field in laboratory. The system includes a rock sample placement device for placing a rock sample, a confining pressure control device for applying a set confining pressure to the rock sample, a fracture imaging device, a fracturing fluid injection device for injecting fracturing fluid into the perforation in the wellbore of the rock sample to form fractures within the rock sample, a stress measurement device, and a processing device for calculating a stress field proactive utilization coefficient of the rock sample.

Abstract: A system and a method evaluate the effect of proactive utilization of a spatial stress field in laboratory. The system includes a rock sample placement device for placing a rock sample, a confining pressure control device for applying a set confining pressure to the rock sample, a fracture imaging device, a fracturing fluid injection device for injecting fracturing fluid into the perforation in the wellbore of the rock sample to form fractures within the rock sample, a stress measurement device, and a processing device for calculating a stress field proactive utilization coefficient of the rock sample.