Disclosed are fluoropolymers with low CWST values and porous membranes made from the fluoropolymers. The fluoropolymer is made up of polymerized monomeric units of the formula A-XCH.sub.2B, wherein A is C.sub.6F.sub.13(CH.sub.2).sub.2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33? C. copolymer. The porous membranes are suitable for degassing a variety of fluids.

Disclosed is a multilayer optical compensation film comprising a first layer comprising a positive C-plate material and a second layer comprising a polyimide, as well as polymer compositions and resins and solutions containing said polymer compositions. The optical compensation film has a reversed wavelength dispersion that is capable of providing an achromatic (or broadband) retardation compensation. The optical film can be used in optical devices such as liquid crystal displays (LCD) or organic light emitting diode (OLED) displays.

Disclosed is a multilayer optical compensation film comprising a first layer comprising a positive C-plate material and a second layer comprising a polyimide, as well as polymer compositions and resins and solutions containing said polymer compositions. The optical compensation film has a reversed wavelength dispersion that is capable of providing an achromatic (or broadband) retardation compensation. The optical film can be used in optical devices such as liquid crystal displays (LCD) or organic light emitting diode (OLED) displays.

Disclosed is an optical compensation film made of a solution cast of a polymer blend comprising a nitrated styrenic fluoropolymer and a polyimide. The compensation film is a positive-C plate having reversed wavelength dispersion that is capable of providing an achromatic (or broadband) retardation compensation. The optical film of the invention can be used in an optical device such as liquid crystal display (LCD) or organic light emitting diode (OLED) display.

Disclosed is an optical compensation film made of a solution cast of a polymer blend comprising a nitrated styrenic fluoropolymer and a polyimide. The compensation film is a positive-C plate having reversed wavelength dispersion that is capable of providing an achromatic (or broadband) retardation compensation. The optical film of the invention can be used in an optical device such as liquid crystal display (LCD) or organic light emitting diode (OLED) display.

A solid polymer electrolyte may include: (a) at least one comb polymer including a main chain formed from 1-ethenyl- and/or 1-allyl-2,3,4,5,6-pentafluorobenzene monomers, some of the monomer units of the main chain bearing polymeric side chains based on polymers that are solvents for alkali metal or alkaline-earth metal salts; the chains being grafted in the para position of the pentafluorophenyl groups; and (b) at least one alkali metal or alkaline-earth metal salt, in particular a lithium salt. A process may prepare such a solid polymer electrolyte film it may be used in an electrochemical system, in particular a lithium battery.

A solid polymer electrolyte may include: (a) at least one comb polymer including a main chain formed from 1-ethenyl- and/or 1-allyl-2,3,4,5,6-pentafluorobenzene monomers, some of the monomer units of the main chain bearing polymeric side chains based on polymers that are solvents for alkali metal or alkaline-earth metal salts; the chains being grafted in the para position of the pentafluorophenyl groups; and (b) at least one alkali metal or alkaline-earth metal salt, in particular a lithium salt. A process may prepare such a solid polymer electrolyte film it may be used in an electrochemical system, in particular a lithium battery.

The present invention provides a conductive material including: (A) a -conjugated polymer, (B) a dopant polymer which contains one or more repeating units selected from a1 to a4 respectively shown by the following general formula (1) and has a weight-average molecular weight in the range of 1,000 to 500,000, and (C) one or more salts selected from the group consisting of a metal salt of carboxylic acid, a metal salt of -diketone, a metal nitrate, a metal carbonate, a metal bicarbonate, a metal halide, and a metal hydroxide, with the metal being selected from the group consisting of cesium, rubidium, barium, and strontium. There can be provided a conductive material which is neutral and highly suitable for a printer, superior in film-formability, and also can form a conductive film having high transparency and conductivity, excellent flexibility and flatness when the film is formed from the material. ##STR00001##

Disclosed is a preparation method for a polytrifluorostyrene. The method comprises: (i) providing a pre-emulsion of a trifluorostyrene monomer and a non-perfluorinated fluorine-containing anionic surfactant, wherein based on the weight of the trifluorostyrene monomer, the amount of the non-perfluorinated fluorine-containing anionic surfactant in the emulsion is 0.1-5 wt %, the non-perfluorinated fluorine-containing anionic surfactant has the general formula: CF.sub.3(CFX)n-(CH.sub.2)m-(C.sub.6H.sub.4)o-M, where n is an integer of 1-7, m is an integer of 1-4, and o is an integer of 0-2; X is selected from F, CF.sub.3, OCF.sub.3, and FCF.sub.2C(CF.sub.3).sub.2; and M is selected from a carboxyl group, a sulfo group or respective salts thereof; (ii) adding an initiator to initiate a microemulsion polymerization reaction of the trifluorostyrene monomer; and (iii) adding a coagulant for demulsification.

Disclosed are fluoropolymers with low CWST values and porous membranes made from the fluoropolymers. The fluoropolymer is made up of polymerized monomeric units of the formula A-XCH.sub.2B, wherein A is C.sub.6F.sub.13(CH.sub.2).sub.2, X is O or S, and B is vinylphenyl, and the fluoropolymer has a weight average molecular weight (Mw) of at least 100 Kd and/or a glass transition temperature of at least 33 C. copolymer. The porous membranes are suitable for degassing a variety of fluids.