Abstract: A polyethylene powder having a viscosity-average molecular weight of 200,000 or more and 10,000,000 or less, wherein complex viscosity under predetermined conditions for measurement of slurry viscoelasticity satisfies the following formula (1): ?25.0×104? { ? "\[LeftBracketingBar]" ? * ? "\[RightBracketingBar]" ? ( T max ) - ? "\[LeftBracketingBar]" ? * ? "\[RightBracketingBar]" ? ( T min ) } / ( T max - T min ) ? - 5. × 10 4 ( 1 ) (|?*|(Tmax): an absolute value of complex viscosity (Pas) at Tmax, (Tmin): an absolute value of complex viscosity (Pas) at Tmin, Tmax: maximum temperature (° C.) within a range in which the formula (2) is satisfied, Tmin: minimum temperature (° C.) within a range in which the formula (2)) is satisfied: d(log|?*|)/dT ??0.1 (2) (|?*|: an absolute value of complex viscosity (Pas), T: temperature).

Abstract: The object of the disclosure is to provide a multilayer porous membrane that can improve heat resistance (ability to inhibit heat shrinkage) and strength when the thickness of a nonaqueous electrolyte solution battery separator has been decreased, while inhibiting friction on the separator surface as a whole, and that can also increase energy density in a nonaqueous electrolyte solution battery, as well as a nonaqueous electrolyte solution battery separator and a nonaqueous electrolyte solution battery comprising the same.

Abstract: A polyethylene powder having a viscosity-average molecular weight of 200,000 or more and 10,000,000 or less, wherein complex viscosity under predetermined conditions for measurement of slurry viscoelasticity satisfies the following formula (1): ?25.0× 104? { ? "\[LeftBracketingBar]" ? * ? "\[RightBracketingBar]" ? ( T max ) - ? "\[LeftBracketingBar]" ? * ? "\[RightBracketingBar]" ? ( T min ) } / ( T max - T min ) ? - 5. × 10 4 ( 1 ) (|?*|(Tmax): an absolute value of complex viscosity (Pas) at Tmax, (Tmin): an absolute value of complex viscosity (Pas) at Tmin, Tmax: maximum temperature (° C.) within a range in which the formula (2) is satisfied, Tmin: minimum temperature (° C.) within a range in which the formula (2)) is satisfied: d(log|?*|)/dT ??0.1 (2) (|?*|: an absolute value of complex viscosity (Pas), T: temperature).

Abstract: A polyethylene powder satisfying (Requirements 1 to 3): (Requirement 1): viscosity-average molecular weight (Mv) is 200,000 or more and 3,000,000 or less (Requirement 2): complex viscosity |?*|m obtained by measurement under predetermined <Conditions for Measurement of Slurry Viscoelasticity>satisfies the following formula (1): 590.0×(Mv×10?4)1.18?|?*|m?13.3×(Mv×10?4)1.18 (1) (Requirement 3): a value of any peak when d(log|?*|)/dT is plotted against temperature is 1.0 or more and 3.0 or less.

Abstract: The present invention addresses the problem of providing a solid catalyst capable of achieving high selectivity and high yield for isosorbide, preferably at the same time, in a dehydration reaction by which dianhydrosugar alcohol is obtained from a sugar alcohol, particularly, in a dehydration reaction by which isosorbide is obtained from sorbitol. The above-mentioned problem is solved by a solid catalyst for a dehydration reaction for preparing dianhydrosugar alcohol from sugar alcohol, said catalyst including an H-type ? zeolite having an atomic composition ratio of Si to Al (Si/Al) of more than 20.

Abstract: The present invention addresses the problem of providing a solid catalyst capable of achieving high selectivity and high yield for isosorbide, preferably at the same time, in a dehydration reaction by which dianhydrosugar alcohol is obtained from a sugar alcohol, particularly, in a dehydration reaction by which isosorbide is obtained from sorbitol. The above-mentioned problem is solved by a solid catalyst for a dehydration reaction for preparing dianhydrosugar alcohol from sugar alcohol, said catalyst including an H-type ? zeolite having an atomic composition ratio of Si to Al (Si/Al) of more than 20.