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 Wysłany: Sob 22:19, 07 Maj 2011 Temat postu: abercrombie en fitch CIEC Exhibition Co., Ltd. Bei |
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CIEC Exhibition Co., Ltd. Beijing InfoTrends announced jointly with the United States,
At which limits its application. Another modification is the blending can improve the mechanical properties and processability,[link widoczny dla zalogowanych], and cost-effective way to reduce the PLA. Preparation of the blend is widely used in several ways melt blending, solution casting film formation method, solution sedimentation, water as blowing agent,[link widoczny dla zalogowanych], a single screw or twin-screw extruder prepared foam. Slow degradation of the PLLA, the degradation is not part of the persistent side effects, sometimes in local produce aseptic inflammation. PDIA biological relative passengers with a better and faster degradation rate, but difficult to prepare high molecular weight product, even if the product of high molecular weight were prepared, but also a highly rigid, the lack of toughness of the material, it is difficult to meet the requirements. Citrate with a small molecule of poly D, L lactide addition of a plasticizer. Citrate better plasticization of materials greatly improved toughness, to further accelerate the degradation rate can be used as a new type of special requirements for degradation of material. PLA can also add the phthalate ester plasticizer: For a polyester copolymer of lactide still use polyester plasticizers, adding talc, stearic acid salt nucleating agent to increase the transparency of the material, also adding some inorganic materials, heat stabilizers, plasticizers, lubricants and other additives to increase the performance of a particular aspect of the material. Direct polymerization of the lactic acid is difficult to obtain high molecular weight product,[link widoczny dla zalogowanych], a search for a new access to high molecular weight poly lactic acid method, which is to use chain extenders handle direct polycondensation of lactic acid oligomers, get high molecular weight of polylactic acid. Chain extender can be used as the material, the majority is a high activity of bifunctional small molecules. PLA materials have undoubted advantages such as good biodegradability, biocompatibility, etc., in today's society must have a broad research and application prospects. But its shortcomings are evident, and greatly impedes its practical application. Polylactic acid material for these shortcomings, future research work will be from several aspects: ① to continue to improve conditions for the synthesis of polylactic acid to produce ultra-high molecular weight and molecular weight of polylactic acid, and to simplify and shorten the process, reduce the accumulation lactic acid material costs. ② polylactic acid with the new material was modified to overcome the existing shortcomings in the development of new applications based on polylactic acid material. One can use organic inorganic hybrid nano-particle method was modified to the polylactic acid. (Continued) Joint lifting force, image and document processing industry consulting firm InfoTrends with China one of the largest convention and exhibition management companies one by one in Beijing China and Hong Kong Exhibition Group Exhibition Co., Ltd. jointly announced: two in 2007 l1 14 to 17 in Beijing,[link widoczny dla zalogowanych], China International Exhibition Centre, the first digital printing equipment, digital workflow,[link widoczny dla zalogowanych], digital-to-plate, and wide format printing. 2 will provide a starting point of the communication platform to show the world China's market demand cutting-edge digital printing technologies, products and solutions. found that this exhibition will help them in this fast growing market to find their place. This is the focus of this exhibition, the Chinese printing market is a vital contribution. our best to provide the most information for the audience the value of conferences and exhibitions.
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[link widoczny dla zalogowanych]
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