581results about How to "Increase the rate of crystallization" patented technology

Apparatus and method for forming a polycrystalline silicon thin film by converting an amorphous silicon thin film into the polycrystalline silicon thin film using a metal are provided. The method includes: a metal nucleus adsorbing step of introducing a vapor phase metal compound into a process space where the glass substrate having the amorphous silicon formed thereon is disposed, to adsorb a metal nucleus contained in the metal compound into the amorphous silicon layer; a metal nucleus distribution region-forming step of forming a community region including a plurality of silicon particles every metal nucleus in a plane boundary region occupied by the metal compound by a self-limited mechanism due to the adsorption of the metal nucleus; and an excess gas removing step of purging and removing an excess gas which is not adsorbed in the metal nucleus distribution region-forming step.

A memory device adapted to a chalcogenide phase-change memory is disclosed. The memory device comprises a top electrode, a bottom electrode, and a phase-change thin film between the top electrode and the bottom electrode. The phase-change thin film is a chalcogenide (Ge-Sb-Te) alloy doped with Tin (Sn) therein. Tin (Sn) doped in the chalcogenide (Ge-Sb-Te) alloy can enhance the crystallization rate of the phase-change thin film for improving the operation speed of the memory.

The invention discloses a preparation method of polycarbonate/polyester alloy. Glycidyl methacrylate grafted ethylene-octylene multipolymer/organic modified needle-shaped aedelforsite composite toughener, i.e. a technology of simultaneously using organic/inorganic rigid particle toughener is adopted; the glycidyl methacrylate grafted ethylene-octylene multipolymer, organic modified needle-shaped aedelforsite, polycarbonate and polyester are melted and mixed in a double-screw extruder, to obtain high-performance alloy material. The prepared polycarbonate/polyester alloy has excellent integrated mechanical properties and size stability, the notched impact strength reaches 1200J/m, the tensile strength reaches 67MPa, the elongation at break reaches 250 percent, the flexural strength is up to 98MPa, the flexural modulus reaches 2750MPa, and the thermal deformation temperature in high load (1.82MPa) is up to 105 DEG C. Therefore, the prepared polycarbonate/polyester alloy can be applied in cars, and to outer decorations, household electrical appliances, IT and the like industrial products.

The invention relates to a biodegradable polycarbonate butylene terephthalate composite material and a preparation method of the biodegradable polycarbonate butylene terephthalate composite material. The biodegradable polycarbonate butylene terephthalate composite material is characterized in that the material comprises the following components in part by weight: 30 to 70 parts of aliphatic polycarbonate butylene terephthalate, 10 to 40 parts of other biodegradable materials, 1.0 to 10 parts of filler, 0.5 to 1.5 parts of rare earth composite nucleating agent, 0.5 to 1.5 parts of dispersant, 4.0 to 15 parts of plasticizer, 1.5 to 4 parts of heat resistance stabilizer, 0.05 to 1.5 parts of antioxidant, 0.5 to 1.0 part of lubricant, 0.1 to 1.0 part of anti-block agent and 0.05 to 0.5 part of biodegradation accelerator. The composite material has high melt strength, good film forming ability, high tensile strength, high tearing strength and good light-conversion effect.

Monolayer packages comprised of an oxygen scavenging composition suitable for direct contact with package contents and recycle with other polyester bottles are disclosed. The oxygen scavenging composition is comprised of a modified copolymer which is comprised of predominantly polyester segments and an oxygen scavenging amount of oxygen scavenging segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. Use of these oxygen scavenging copolymers in bottles provides a clear and rigid monolayer bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolymers of this invention are over 99 wt % PET and contain less than 50 ppb of extractable components.

Disclosed are certain novel polyester compositions particularly useful for shaping or forming into containers and similar shaped articles by thermoforming procedures. The polyester compositions comprise a thermoplastic polyester, an impact modifier and a polyester crystallization rate enhancing component selected from poly(tetramethylene terephthalate) homo- and co-polymers. The polyester compositions exhibit improved crystallization rates as compared to similar compositions not including impact modifier or compositions using other types of crystallization rate enhancing components such as polyolefin-based polymers.

The present invention relates to a kind of biodegradable polyester and its preparation method, which belongs to the field of biodegradable co-polyester product technology. The number-average molecular weight of the biodegradable polyester material under this invention is 6000-135000 g/mol, the molecular weight distribution is 1.2-6.5, and the range of crystallization temperature is 15° C.-105° C., which could overcome the disadvantages of existing technical products and can be processed into membrane materials, sheet materials and foam materials. During processing, the picking property will be dramatically changed with the appearance quality improved; after heat resistance is improved, this new type of polyester material could also be applied to the processing course with long cycles, for example, the injection processing course, and the biodegradable aliphatic/aromatic polyester materials provided by this invention has excellent mechanical properties.

The invention relates to a rapid crystallization polylactic acid composite material and a preparation technique thereof. The composite material comprises the following components in portion by weight: 59 to 98 portions of hypocrystalline poly-L-lactic acid, 1 to 40 portions of organic modified natural mineral, 1 to 20 portions of organic crystallization promoter, 0.1 to 1.0 portion of heat stabilizer, and 0.05 to 1.0 portion of lubricant. The sum of the mass percentage of the components is 100 percent. The preparation method for the material comprises the following steps: firstly preparing the modified natural mineral; then mixing the components according to the components of the composite material; agitating and mixing the raw materials evenly through a high-speed agitator; and adding the co-mixture into a twin screw extruder for extrusion and granulation. The method improves the crystallization rate of a polylactic acid matrix through the synergistic action of organized mineral and the crystallization promoter. Due to the addition of the organic crystallization promoter, the method strengthens the mechanical properties of the polylactic acid composite material, while simultaneously quickening the crystallization rate of polylactic acid, thereby avoiding the defect of greatly reducing the mechanical properties of the polylactic acid composite material caused by the addition of a single inorganic mineral nucleating agent. The price of adopted fillers is low; and the whole preparation method has a simple technological process and less consuming time of the technological process, and can realize the large-scale industrialized production.

The invention relates to a method for preparing high-solid-content waterborne polyurethane. The method comprises the following steps of: (1) reacting sulfonate-containing sodium dimethyl isophthalate-5-sulfonate with excessive polylol for a while, and then, adding polyacid to react so as to synthesize hydroxyl-terminated polyester; and (2) using the synthesized waterborne polyester as a soft segment, using diisocyanate as a hard segment, adding water to disperse, and carrying out chain extension by using polyamine so as to obtain the high-solid-content waterborne polyurethane. According to the method, the dispersion is easy, a large amount of solvent is not required for being used, the cost is saved, the solvent removal is easy, and the solid content reaches over 50% while lower viscosity is kept, so that the constructability of adhesive liquid is improved, and the adhesive liquid is crystallizable and has better initial viscosity and better adhesive strength; and the used polyester is synthesized autonomously, the raw materials are all common, and the process is simple, so that the cost is saved, and the industrialization is facilitated.

This invention provides a method for forming a microcrystalline silicon film, which employs a three-stage deposition process to form a microcrystalline film. A microcrystalline silicon seed layer is formed on a substrate. Gaseous ions are used to bombard a surface of the microcrystalline silicon seed layer. Microcrystalline silicon is formed on the microcrystalline silicon seed layer after the bombardment to a predetermined thickness.

The invention relates to a high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material. The blend material comprises the following raw materials by weight: 60 to 100 parts of UHMWPE, 5 to 12 parts of HDPE, 6 to 16 parts of LLDPE, 0.1 to 3 parts of a high-molecular-weight polymer nucleating agent and 1.5 to 3 parts of a flow modifier. The high-molecular-weight polymer nucleating agent has the advantages of no odor, good dispersibility, good compatibility, capacity of realizing heterogeneous crystallization, a high degree of crystallization and a small application amount; the high-molecular-weight polymer nucleating agent-modified ultrahigh-molecular-weight polyethylene blend material retains original characteristics of polyethylene UHMWPE and has obviously improved tensile strength, impact strength, bending strength, Vicat softening temperature, elongation at break and Shore hardness and a reduced mortar wear rate.

An aliphatic polyester composition contains a low-molecular-weight aliphatic polyester having weight-average molecular weight of 5000 to 35000 and a high-molecular-weight aliphatic polyester having weight-average molecular weight of 120000 to 1000000.

The invention belongs to the technical field of high polymer materials, and in particular relates to a polyethylene terephthalate nucleating agent and a preparation method thereof. The method comprises the following steps of: based on polystyrene-b-poly(styrene-alt-maleic anhydride) diblock copolymer as a raw material, hydrolyzing, salinizing and purifying to prepare an ionomer of the polystyrene-b-poly(styrene-alt-maleic anhydride) diblock copolymer. A polystyrene block can form microphase separation in molten polyethylene terephthalate (PET), and thus, a crystal nucleus is provided for PET crystallization; and moreover, a poly(styrene-alt-maleic anhydride) block and PET are well compatible with each other, so that crystallization surface energy can be reduced, and the crystallization temperature and crystallization speed of the PET can be increased. In addition, a plasticizer such as di-2-ethylhexy1 azelate is added while the nucleating agent is added, the movement velocity of a PET chain segment can be further increased, so that the growing speed of crystals is increased. The preparation method is simple, convenient to operate, high in benefit, low in cost and suitable for industrial production.

The invention discloses a polyactic acid/polycarbonate alloy material, and a preparation method and application thereof. The polyactic acid/polycarbonate alloy material comprises the following raw materials in part by weight: 10 to 90 parts of polycarbonate, 10 to 90 parts of polyactic acid, 1 to 20 parts of liquid crystal high polymer and 1 to 25 parts of flexibilizer. The polyactic acid/polycarbonate alloy material is prepared by adding the raw materials into a double-screw extruder to be melted and blended. The polyactic acid/polycarbonate alloy material provided by the invention has environmentally-friendly characteristics and excellent physical and mechanical properties, and greatly improves impact strength, bending modulus and heat distortion temperature. The liquid crystal high polymer is added to promote the quick crystallization of the polyactic acid, so that the prepared polyactic acid/polycarbonate alloy can be formed quickly, the forming cycle is reduced from 80 seconds to50 seconds, processing cost is reduced, flowability and fire resistance are improved, and the polyactic acid/polycarbonate alloy material is applicable in the fields of office automation (OA) equipment, communication equipment, automobile parts, domestic appliances and the like.

The invention relates to a starch and polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 20 to 75 parts of modified starch, 10 to 65 parts of polylactic resins, 2 to 10 parts of hydroxy-terminated lactic acid oligomer with molecular weight of 800 to 2000, 1 to 10 parts of plasticizers, 0.1 to 1.0 part of aliphatic chain extenders, 0.5 to 2 parts of talcum powders and 0.1 to 3 parts of auxiliaries. The preparation method includes that firstly the modified starch, the polylactic acids, the hydroxy-terminated lactic acid oligomer, the plasticizers, the talcum powders, lubricating agents and coupling agents are blended together in a homogenizer to obtain a blend, and then a mixed material of the blend and the chain extenders is added in a twin-screw extruder to be subjected to melt extrusion, cooling and granulation to obtain the starch and polylactic acid composite material. The starch and polylactic acid composite material has the advantages that the compatibility, toughness and heat resistance are good, the cost is low, the biodegradation can be completely achieved, the preparation technique process is simple, the 'three wastes' emission is absent, and the mass production can be achieved.

A phase change material layer includes germanium (Ge), antimony (Sb), tellurium (Te) and at least one impurity elements. An atomic concentration of impurity elements ranges from about 0<a≦about 0.25 and an atomic concentration of antimony (Sb) ranges from about 0.03<c≦about 0.15.

The invention relates to modified PET (Polyethylene terephthalate) polyester as well as a preparation method and application thereof, and belongs to the field of modified polyester. The modified PET polyester comprises aerogel particles and polyethylene terephthalate; the aerogel particles are dispersed between the molecular chains of the polyethylene terephthalate uniformly; the particle size of the aerogel particles is 2 to 3 microns; the content of the aerogel particles in the modified PET polyester is 1 to 10 percent by weight. Modified PET is prepared by the steps of adding the aerogel powder into glycol, putting into a grinding machine, grinding to prepare mixed slurry, mixing the mixed slurry and terephthalic acid, and performing esterification reaction and polymerization reaction. Modified PET fiber is prepared by slicing the modified PET, metering, spinning, cooling, applying oil, stretching, performing heat setting and performing winding formation. The aerogel particles are introduced before polymerization of the PET polyester, so the prepared PET has high spinnability, can produce modified PET fibers with various thickness, has wide application range and can meet the production requirement of various fabrics.

The invention discloses a PPS (polyphenylene sulfite)/LCP (liquid crystal polymer) composite material and a preparation method thereof. The method comprises the following raw materials in parts by weight: polyphenylene sulfide, a liquid crystal polymer, a compatilizer, a filling and reinforcing agent, a lubricating agent and other aids. The preparation method comprises the following steps of: (a) respectively drying polyphenylene sulfide resin and the liquid crystal polymer; (b) uniformly mixing the filling and reinforcing agent, the lubricating agent and other aids; (c) mixing the raw materials processed in the steps (a) and (b) at a high speed, then adding the compatilizer and uniformly mixing; and (d) melting and extruding the mixed raw materials in the step (c) by using a double-screw extruder and granulating. The invention provides the PPS/LCP composite material having high strength and rigidity and also provides the preparation method of the PPS/LCP composite material with simple preparation process, low cost and good economic benefits.

The invention relates to a solar cell encapsulating EVA (ethylene vinyl acetate copolymer) adhesive film with high light transmittance. The solar cell encapsulating EVA adhesive film is characterized in that the thickness of the EVA adhesive film is 0.8 mm-1.1 mm, and the EVA adhesive film is prepared from raw materials in parts by weight as follows: 100 parts of EVA resin, 0.5-2.5 parts of a plasticizer, 0.1-0.3 parts of a photoelectric conversion rate enhancer, 1-4 parts of an anti-aging agent, 1.5-2.5 parts of a blocking agent, 1-2 parts of a dispersing agent, 1-3 parts of a coupling agent and 1-3 parts of a cross-linking agent. Firstly, the raw materials are added to a mixer proportionally and mixed into uniform components, the components are subjected to melt mixing by a banbury mixer and then subjected to extrusion and pelletizing, and the EVA adhesive film is obtained. According to the prepared EVA adhesive film, the light transmittance of the adhesive film is not influenced and the mechanical properties are greatly improved while properties and photoelectric conversion efficiency of the adhesive film are improved with addition of multiple additives.