Abstract:
A microporous polymeric film of high porosity comprises a halopolymer in which the repeating units are -(CnH2n)- and -(CmX2m)- in which each X independently represents fluorine or chlorine and the values of n and m are greater than one and less than six. The film is the result of firstly melt processing a mixture of the halopolymer, more than 150 parts by weight of an extractable salt and not more than 80 parts by weight of an extractable polymer per 100 parts by weight of the halopolymer, the extractable polymer not being completely and homogeneously mixed with the halopolymer and being less viscous than the halopolymer when both are molten so that the surfaces of the film resulting from melt processing are rich in the extractible polymer, and secondly extracting at least some of the extractable salt to render the film porous and extracting at least some of said polymer to impart surface porosity to the film. The film has a porosity of more than 50 % by volume and more usually 60-70 %. The film may be used as the separator of an electrochemical cell e.g. a battery having a lithium anode and a thionyl chloride electrolyte. It has further been found that high porosities and good electrical properties can be obtained by using as extractable polymer a material having a molecular weight less than one million e.g. a polyethylene oxide of molecular weight about 100,000.
Abstract:
본 발명은 환경에 대한 부하가 큰 용제의 사용을 피할 수 있는 동시에, 공극률 및 구멍 직경 등의 파라미터도 비교적 용이하게 제어할 수 있는, 비수전해질 축전 디바이스용 세퍼레이터의 제조 방법을 제공하는 것을 목적으로 한다. 본 발명은 10 내지 50㎛의 범위의 두께를 갖는 비수전해질 축전 디바이스용 세퍼레이터를 제조하는 방법이며, 에폭시 수지와, 경화제 및 포로겐을 포함하는 에폭시 수지 조성물을 제조하는 공정과, 에폭시 수지 시트가 얻어지도록, 상기 에폭시 수지 조성물의 경화체를 시트 형상으로 성형하거나 또는 상기 에폭시 수지 조성물의 시트 형상 성형체를 경화시키는 공정과, 무할로겐 용제를 사용하여 상기 에폭시 수지 시트로부터 상기 포로겐을 제거하는 공정을 포함하는 비수전해질 축전 디바이스용 세퍼레이터의 제조 방법에 관한 것이다.
Abstract:
Technologies and implementations for providing melt processable polyvinyl alcohol) blends and polyvinyl alcohol) based membranes are generally disclosed.
Abstract:
A water soluble polymer blend composition includes at least one water soluble polymer and at least one immiscible polymer. The water soluble polymer and the immiscible polymer can be melt processed at a temperature above their respective melt processing temperatures and quenched to form the water soluble polymer blend composition in a non-equilibrium state, such that it can exhibit a non-equilibrium morphology. Non-equilibrium morphologies can include, e.g., a microfiber morphology or a co-continuous morphology.
Abstract:
A trifluoroacetic acid-based etchant is described that can remove a sacrificial component of a multi-component polymer, e.g., a self-assembled block copolymer. The etchant can operate at a high etch rate and with excellent selectivity. The etchant can remove a hydrolysable sacrificial component such as a polylactide block from a self-assembled block copolymer. The etchant enables the macroscopic preservation of the nanostructure morphologies of self-assembled copolymers (e.g., poly(styrene-block-lactide) copolymers) and can yield pristine porous films of the non-hydrolysable component of the starting multi-component polymer.
Abstract:
A polyphenylene sulfide porous body has, on its surface, porous areas having porous structures, and non-porous areas having substantially no porous structures. Provided is a polyphenylene sulfide porous body that has heat resistance and chemical resistance and overcomes the trade-off between mechanical characteristics and permeation performance.
Abstract:
A method of producing a porous molded part includes a mixing process for mixing a granular porous organizer composed of a water-soluble compound, a porous forming assistant agent composed of a polyhydric alcohol, and a cross-linking agent composed of an organic peroxide with a thermoplastic resin composition having a glass transition temperature below 0° C. to obtain a molding material; a cross-linking and forming process for placing the molding material in a molding die and performing a heat press molding thereby progressing coincidentally a cross-linking reaction and a shape forming of a seal face to obtain a molded material; an extracting process for extracting the granular porous organizer from the molded material obtained in the cross-linking and forming process to obtain a porous molded part; and a drying process for drying the porous molded part obtained in the extracting process.