The present specification relates to a block polymer and a polymer electrolyte membrane including the same, a membrane-electrode assembly including the polymer electrolyte membrane, a fuel cell including the membrane-electrode assembly and a redox flow battery including the polymer electrolyte membrane.

Provided are a lens for spectacles containing a resin having a refractive index of 1.65 or more and an ultraviolet absorbing agent A having, in a case where an absorbance at a maximum absorption wavelength is 1.0, an absorbance ratio at 410 nm of 0.10 or less and an absorbance ratio at 400 nm of 0.1 or more, where a proportion of the absorbance ratio at 400 nm to the absorbance ratio at 410 nm is 5.0 or more, and spectacles.

Provided are a lens for spectacles containing a resin having a refractive index of 1.65 or more and an ultraviolet absorbing agent A having, in a case where an absorbance at a maximum absorption wavelength is 1.0, an absorbance ratio at 410 nm of 0.10 or less and an absorbance ratio at 400 nm of 0.1 or more, where a proportion of the absorbance ratio at 400 nm to the absorbance ratio at 410 nm is 5.0 or more, and spectacles.

Various photocrosslinkable electrochromic polymers are disclosed. The polymers are suitable for an electrochromic layer of an electrochromic device. The polymers are formed with a two-step synthesis method that includes forming a polymer precursor with one or more chromophore blocks, and mixing the polymer precursor with photocrosslinkable monomer units to form the polymer.

A triazine ring-containing polymer including a structural unit represented by General Formula 1:

*-[A-B-]-*General Formula 1 wherein, in General Formula 1, A is represented by General Formula 2, B is represented by General Formula 3, and * indicates a point linked to another group or structural unit:

##STR00001## wherein, in General Formula 2 and General Formula 3, L, R.sub.1 to R.sub.6, m1, n1, and * are the same as defined in the detailed description.

The present invention relates to apparatuses and processes for manufacturing polymers of thiophene, benzothiophene, and their alkylated derivatives. A process for manufacturing polymers that includes isolating a sulfur-containing heterocyclic hydrocarbon from cracked naphtha and reacting the sulfur-containing heterocyclic hydrocarbon with a super acid to produce a polymer.

The present invention relates to apparatuses and processes for manufacturing polymers of thiophene, benzothiophene, and their alkylated derivatives. A process for manufacturing polymers that includes isolating a sulfur-containing heterocyclic hydrocarbon from cracked naphtha and reacting the sulfur-containing heterocyclic hydrocarbon with a super acid to produce a polymer.

The present invention relates to apparatuses and processes for manufacturing polymers of thiophene, benzothiophene, and their alkylated derivatives. A process for manufacturing polymers that includes isolating a sulfur-containing heterocyclic hydrocarbon from cracked naphtha and reacting the sulfur-containing heterocyclic hydrocarbon with a super acid to produce a polymer.

The present invention relates to apparatuses and processes for manufacturing polymers of thiophene, benzothiophene, and their alkylated derivatives. A process for manufacturing polymers that includes isolating a sulfur-containing heterocyclic hydrocarbon from cracked naphtha and reacting the sulfur-containing heterocyclic hydrocarbon with a super acid to produce a polymer.

The invention provides a polymer comprising two or more residues of formula III or IV or salts thereof: wherein dash line, X, Y, Q, L, M, n, R.sup.1, R.sup.2, R.sup.a, R.sup.b, R.sup.c and R.sup.d have any of the values defined in the specification, as well as synthetic intermediates and synthetic methods useful for preparing the compounds. The polymer is useful to treat contaminated water by chelating metal. ##STR00001##