Abstract:
Composition comprenant une phase interne dispersée dans une phase continue hydrophile DEPOSANT Institut National de la Recherche Agronomique - INRA La présente invention concerne une composition, avantageusement une émulsion ou une mousse, comprenant une phase interne dispersée dans une phase continue hydrophile, possédant un pourcentage de phase interne supérieur à 50%. Cette composition d'émulsion contient des nanocristaux d'un polysaccharide autre que la cellulose, avantageusement de chitine, qui sont localisés à l'interface entre ladite phase interne et ladite phase continue hydrophile.
Abstract:
Disclosed herein are methods for manufacturing a porous polymer matrix, optionally containing a bioactive material. The methods comprise the steps of providing a solution comprising a polymer dissolved in a solvent, and causing the polymer to precipitate from the solvent to form a polymer matrix.
Abstract:
A microporous film which is produced by cooling a solution comprising a vinylidene fluoride polymer having a weight-average molecular weight of 1x10 or higher and a solvent therefor to form a two-phase gel and comprises a polymer phase comprising the vinylidene fluoride polymer and having pores which have an average pore diameter as measured by the half-dry method of 0.005 to 5 mu m and extend from one to the other side of the film, wherein the inner structure is a percolation structure defined by the following(A):(A)a structure which is an isotropic network structure consisting of a polymer phase three-dimensionally branched in random directions and having, surrounded by the polymer phase, interconnecting pores in which the ratio of the maximum pore diameter as measured by the bubble point method to the average pore diameter as measured by the half-dry method is 2.0 or lower.
Abstract:
The invention relates to a process for preparing porous polyolefin particles. The process according to the invention is characterized in that it comprises the following steps: 1) dissolving at least one crystallizable polyolefin in a solvent, in the absence of a nucleating agent; 2) dispersing the polyolefin solution obtained in a non-solvent in the presence of a surfactant, at a temperature that is higher than the crystallization temperature of the polyolefin in the polyolefin solution; 3) cooling the multi-phase system obtained with stirring, at a rate of between 0.05 and 10 DEG C/min to a temperature that lies below the crystallization temperature of the polymer in the polymer solution, so that firm polyolefin particles are formed; 4) separating the polyolefin particles; 5) drying the polyolefin particles. The invention also relates to a porous polyolefin particle with a high effective loadability and a narrow particle size distribution.
Abstract:
미공성 재료 및 물품이 개시된다. 상기 미공성 재료는 결정화가능한 프로필렌-함유 중합체, 베타-핵형성제, 및 중합체의 용융 온도를 넘는 온도에서 중합체와 혼화가능하며 중합체 결정화 온도 미만의 온도에서는 중합체로부터 상이 분리되는 희석제를 함유한다. 본 발명은 또한 열 유도된 상 분리 및 이어지는 가공을 이용하는 상기 미공성 재료의 형성 방법에 관한 것이다.
Abstract:
PURPOSE: A manufacturing method of a polyolefin microporous film is provided to manufacture a microporous film with excellent physical properties by deriving the liquid-liquid phase separation of a polyolefin and a diluting agent during an extrusion process. CONSTITUTION: A manufacturing method of a polyolefin microporous film comprises a step of injecting 30-60 wt% of a polyolefin and 70-40 wt% of a composition including a diluting agent capable of conducting a thermodynamic liquid-liquid phase separation with the polyolefin, into an extruder, and manufacturing a single phase melted material by melt-mulling the composition; and a step of conducting the liquid-liquid phase separation by making the melted material pass through a region the temperature of which is lower than a liquid-liquid separation temperature and extruding and molding the separated polyolefin into a sheet shape. [Reference numerals] (AA) Temperature (°C); (BB) HDPE/BET liquid-liquid phase separation; (CC) HDPE/BET solid-liquid phase separation; (DD) HDPE/EBN.W liquid-liquid phase separation; (EE) HDPE/EBN.W solid-liquid phase separation; (FF) HDPE ratio (wt%)
Abstract:
Microporous articles are formed by solid-liquid phase separation from a diluent in combination with a thermoplastic polymer, flame retardant and a hindered amine synergist providing novel flame retardant articles. Such articles are useful in clothing, barriers, optical films in electronic devices (such as light reflective and dispersive films), printing substrates and electrical insulation.
Abstract:
A method of making a porous polymeric material by heating a mixture of a thermoplastic polymer and a cationic or non-ionic surfactant having a hydrophilic-lipophilic balance range of 4.0 to 6.0 to a temperature and for a time sufficient for the polymer and surfactant to mutually dissolve. The mixture is then cooled to a temperature so that non-equilibrium liquid-liquid phase separation takes place to form a bi-continuous matrix of the polymer and surfactant so that the polymer and surfactant form two intermingled separate phases of large interfacial surface area. The surfactant is then removed from the polymer. The porous polymeric material produced by the above method has a lacey or filamentous structure consisting of a plurality of polymer strands connected together at spaced apart locations along each strand.