7 results about "Polymer yield" patented technology

The invention relates to the technical field of microbial fermentation and food processing, and particularly discloses Weissella fusiformis JMF-006 as well as a mutagenesis method and application thereof. The invention provides a Weissella fusiformis JMF-006 with the exopolysaccharide yield of 20-25g / L. The Weissella fusiformis JMF-006 is obtained by breeding through a mutation breeding method of a high-yield EPS strain, and the mutation breeding method can also be used for culturing other high-yield EPS strains. The invention provides a strain composition, the strain composition comprises Weissella fusiformis JMF-006 or a high-yield EPS strain, other lactic acid bacteria strains (such as lactobacillus plantarum JMF-001 and lactobacillus casei JMF-002) can be further compounded, and the obtained strain composition has more excellent fermentation performance. When the Weissella fusiformis JMF-006, the high-yield EPS strain and the strain composition provided by the invention are applied to the fermentation process of food-derived drinks, a fermented product with stable properties and better flavor can be obtained, and the technical problems that the yield of extracellular polymeric substances is low, the fermentation performance is poor and the application range is narrow in an existing lactic acid bacteria starter are solved.

The invention belongs to the technical field of olefin polymerization, and particularly relates to a method for continuous polymerization of ethylene and alpha-olefin. According to the method, the feeding temperature of the raw materials is 10-30 DEG C; the temperature of the polymerization reaction is 120-150 DEG C; the ratio of the raw material heat removal amount to the polymerization reaction heat exchange amount is Q, and Q is more than 50% and less than 85%; ; xc is the mass ratio of the structural unit from the alpha-olefin monomer in the polymer, Tr is the temperature value of the polymerization reaction by taking DEG C as the unit, Ta is the feeding temperature value of the raw material by taking DEG C as the unit, and W is the reaction solid content; w = yield of polymer / total feed quantity * 100%; the total feed quantity comprises the feed quantity of the raw material, the main catalyst and the cocatalyst; the method is low in energy consumption and high in polymerization activity, the obtained polymer is good in fluidity, equipment cannot be blocked, long-term operation of the equipment is facilitated, and the cost is reduced.

The present invention relates to a process for processing an absorbable slowly crystalline poly (p-dioxanone) milled resin and its fines using a twin screw extruder apparatus to produce uniform pellets. Advantageously, the ground resin material resulting from solid state polymerization is not subjected to processing (such as screening) to remove fines from the feedstock used in an extrusion and granulation system that has been configured with a reverse temperature profile along the extrusion cartridge. The resulting PDS pellets have improved resin uniformity and greater polymer yields, thereby improving operational efficiency and the production of extruded filaments.

In this invention synthetic bottlebrush and comb-like (multi) block polymers (copolymers) can be formulated to form on demand non leachable bottlebrush elastomers with tunable curing time as well as adjustable mechanical and optical properties. The disclosed formulations can be injected directly into the tissue followed up by curing at the physiological conditions. The curing process can be designed with and without using catalysts, initiators, and external stimuli. The cured polymer yield supersoft elastomer with tissue-mimetic mechanical properties.

The application belongs to the technical field of olefin polymerization, and particularly relates to a method for continuous polymerization of ethylene and alpha-olefin. The feeding temperature of raw materials of the method is 10-30 DEG C; the temperature of polymerization reaction is 120-150 DEG C; the ratio of raw material heat removal amount to polymerization reaction heat exchange amount is Q, 50% < Q < 85%; Xc is the mass proportion of structural units from alpha-olefin monomers in the polymer, Tr is the temperature value of polymerization reaction in units of DEG C, Ta is the feeding temperature value of raw materials in units of DEG C, and W is the reaction solid content; W = polymer yield / total feeding amount * 100%; the total feeding amount includes the feeding amounts of raw materials, main catalysts and auxiliary catalysts. The method has low energy consumption, high polymerization activity, good flowability of the obtained polymer, no blocking of equipment, and is beneficial to long-term operation of the equipment and reduction of cost.

An improved method for forming and employing wax to modify polymer yield and melt flow. The method includes: (a) selecting a solid polymer material; (b) heating the solid polymer material in an extruder to produce a molten polymer material; (c) filtering the molten polymer material; (d) placing the molten polymer material in a reactor via a chemical depolymerization process to produce a depolymerized polymer material; and (e) adding the depolymerized material to a prewax mixture to produce a modified polymer.

The present invention is directed to methods for processing absorbable, slow-to-crystallize poly(p-dioxanone) ground resin and its fines utilizing a twin-screw extruder apparatus to produce uniform pellets. Advantageously, the ground resin materials resulting from solid-state polymerization do not undergo processing, such as sieving, to remove fines from the feedstock for an extrusion and pelletizing system that has been configured with an inverted temperature profile along the extrusion barrel. The resulting PDS pellets have improved resin uniformity and greater polymer yield for improved operational efficiencies and production of extruded filaments.