The present disclosure relates to a composition that includes

##STR00001##

where R.sub.1 and R.sub.2 include at least one of a hydrogen, a hydroxyl group, and/or an alkyl group, R.sub.3 and R.sub.4 include at least one of hydrogen, a hydroxyl group, an alkyl group, and/or a ketone, and 1n2000.

This disclosure describes various poly(acetal) polymers including processable, elastomeric poly(acetals). Various polymers described herein have a chemical structure containing cyclic acetal monomer units derived from diglycerol and a dialdehyde compound. The disclosure also relates to a method of preparing such polymers. The method can involve heating and/or adding acid to a mixture containing diglycerol and a dicarbonyl compound so as to obtain an elastomeric polymer.

This disclosure describes various poly(acetal) polymers including processable, elastomeric poly(acetals). Various polymers described herein have a chemical structure containing cyclic acetal monomer units derived from diglycerol and a dialdehyde compound. The disclosure also relates to a method of preparing such polymers. The method can involve heating and/or adding acid to a mixture containing diglycerol and a dicarbonyl compound so as to obtain an elastomeric polymer.

A method for molding amorphous polyether ether ketone including steps of preparing a molten mass including polyether ether ketone, cooling a mold assembly to a temperature of at most about 200 F., and injecting the molten mass into the cooled mold assembly.

A method for molding amorphous polyether ether ketone including steps of preparing a molten mass including polyether ether ketone, cooling a mold assembly to a temperature of at most about 200 F., and injecting the molten mass into the cooled mold assembly.

The synthesis and characterization of phenol-glycol cross-linked polymers are reported. The polymers have high affinity for toxic metal ions such as mercury (II) and can be utilized in methods of analyzing the content of toxic metal ions in a sample and the removal of toxic metal ions from aqueous solutions.

The synthesis and characterization of phenol-glycol cross-linked polymers are reported. The polymers have high affinity for toxic metal ions such as mercury (II) and can be utilized in methods of analyzing the content of toxic metal ions in a sample and the removal of toxic metal ions from aqueous solutions.

A method of producing dimethoxymethane oligomers (DMMn), the method comprising: reacting a formaldehyde source and dimethoxymethane monomer (DMM1) in the presence of an acidic catalyst to produce a reaction effluent comprising DMMn and unreacted DMM1; and separating, from the reaction effluent, DMM1-2 including unreacted DMM1 and DMMn having a chain length n equal to 2 (DMM2), dimethoxymethane oligomers having a chain length n in the range of from 2-5 (DMM2-5), dimethoxymethane oligomers having a chain length n of 5 (DMM5+), or a combination thereof, wherein the separating comprises distillation in the presence of at least one alcohol, a distillate fuel, or both.

A method of producing dimethoxymethane oligomers (DMMn), the method comprising: reacting a formaldehyde source and dimethoxymethane monomer (DMM1) in the presence of an acidic catalyst to produce a reaction effluent comprising DMMn and unreacted DMM1; and separating, from the reaction effluent, DMM1-2 including unreacted DMM1 and DMMn having a chain length n equal to 2 (DMM2), dimethoxymethane oligomers having a chain length n in the range of from 2-5 (DMM2-5), dimethoxymethane oligomers having a chain length n of 5 (DMM5+), or a combination thereof, wherein the separating comprises distillation in the presence of at least one alcohol, a distillate fuel, or both.

The present disclosure is directed to improved poly(arylene ether ketone) powders for use in laser sintering, powder coating, compression molding, or transfer molding.