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Direct synthesis of carbon monoxide biodegradable polymers

Sex. Taiwan directly into the enamel is the subject of the future by increasing the molecular weight of resultant changes in physical properties to an application of Poly lactide polymer chain reported that several articles in the package structure of ancient unit of glycolic acid biodegradable polymer. The direct synthesis from the Poly lactide, can be expected by transesterification, different molecular aggregation and the synthesis of these polymers as raw materials. For example, the United States to study the use of HomeProducts glycolic acid copolymer used as a control drug release capsules I DuPont of lactic acid to glycolic acid copolymer as a controlled feeding of fertilizer, pesticides Jing commercial release of the polymer materials' Cohn companies from poly Poly lactide ethylene oxide or polypropylene and cross-platform or different shade chain together sets of molecular materials, have physical properties of thistle with a wide biodegradable polymer. Dum glycolic acid or lactic acid from the company's salt and synthetic polymer rubber and polycarbonate cell adhesive sets Agents. In addition. Poly lactide and also reported the differences of molecular aggregates PCS paradox vinegar, three from glycolic acid and aliphatic amines, aliphatic polyamide dicarboxylic acid ester chloride, glycolic acid and 8 to the spiritus of the copolymer Pat, hydroxy-succinic acid copolymer off such a table into. Use in medicine, agriculture, forestry, fisheries, such as a crystal clear evening costs packaging materials, etc., may consider the use of biodegradable polymer. May be considered as additives, plasticized Jing, lubricants, fiber or paper additives. German companies by ICI polyester produced by fermentation (trade name Biopo1) trial since 1990, a shampoo bottle. Poly lactide and regenerative raw materials (1) as shown in cross-Poly is characterized by the direct synthesis of vinegar can use cheap raw materials t step Synthesis of Poly AC sugar. The one-step synthesis of polyethylene cross-casein, based on equation (3) - '5) shows, other than coal, oil from oil bitumen, heavy oil, C + H20-÷ C0 + H4 I (3) a CH work ' + Q-war C0 +2 H2, (4) a C ■; 1,2 i-port competition C0 + H2 (5) natural gas and other carbon-owned Lian Shen Yirong easy to get the CO and by equation (6) by ji} from the CO Columbia WO H: easy to get the formaldehyde and other carbon Bute original CO +2 H2-~, CH20H-÷ C0 (6) quantum number l, C. Polymer compounds as raw materials (C polymer), chemical raw materials from the diversification perspective, there are meaningful. Surface and, above Jie water vapor or oxygen oxidation, but also to the plastics, rubber and other polymer waste (Kyrgyzstan have oil, gas and other means) and then l resources into CO, H:. Type (1) direct synthesis of vinegar can be obtained from Poly pay recycling as shown in the following lap to recover t'-÷ - ÷ hungry biodegradable polymer waste - ÷ Recovery ---> HO ~, O twisted Principle rJ , using a polymer units Cl (---- CO + H2 polymer material, if not participate in the recycling of waste can also be decomposed into CO and the use of microbial H:, which can be called that play a role in environmental protection C. Polymers . Conclusion biodegradable polymer in promoting practical, in addition to physical properties and decomposition of resultant safety evaluation, the lower cost of production is an important issue. CO and (CO + Hz) is the ability to recycle the chemical raw materials and cheap in the future expect from an environmental standpoint,[link widoczny dla zalogowanych], to develop new polymer synthesis using CO area 'fees expected to clamor. Chemical E Industries (Japan) 1991I (1a) :79-81 (on the next page No. l6) the coal pieces and beetle tracks o. 1rnm below, after the removal of ash and sulfur content, through i fixed the whole water, so that the concentration of coal to 70% or more. but also the development of small addition of surfactant, stable high concentrations of cwM. CWM made this low in calories, but because they do not have to like c0M Pei heating, insulation equipment, and coal-water slurry system, it can mix sewage, sludge, gasification at high pressure conditions, can remove contaminants and organic matter into a gas station, and harm into the governance change in the function of pollutants, so the technical evaluation to improve the one.. Conclusion of coal as a clean energy goal is to make a one-time conversion of coal into gas or liquid. However, this conversion process is very strict conditions, by the coal composition, structure, nature. and the use of technology limitations. this is necessary to fully study and master the nature and properties of coal conversion and the intrinsic link between the preparation, development of coal who can give full play to its own characteristics Transformation and catalyst, prior to the effective use of the coal conversion, extract useful chemicals favorable conditions to improve their conversion rate, reduce overall costs and achieve efficient use of coal, oil resources will become a source of chemical raw materials, is the urgent development of coal science subject. ● exam. 'Feng Ping dig a capital, 199,0, Yue Xian (2) f1991, (3)