5results about How to "Good nucleation effect" patented technology

The invention discloses a method for preparing functional sugar through ultrasonic-assisted co-crystallization, which comprises the following steps: heating a molasses raw material in a sugar boiling tank, continuously stirring to obtain a cane sugar supersaturated solution, maintaining the temperature of syrup to be lower than 120 DEG C, and monitoring the brix of the syrup in real time; when the brix of the syrup reaches 68-72 degrees Bx, transferring the syrup into a glass dish, cooling to 70 DEG C, and adding the camellia nitidissima leaf polyphenol extract, arabinose and camellia nitidissima micro powder into the syrup in a powder form; transferring the syrup into an ultrasonic water bath kettle, carrying out ultrasonic treatment at 25-35 DEG C, and continuously and mechanically stirring until solid substances appear; and transferring the obtained solid substance into a metal disc, and drying in a vacuum drying oven at 63-67 DEG C for 22-24 hours.

The present invention belongs to the technical field of functional polymer materials, and discloses a low melt index and low shrinkage PPH sheet and a preparation method thereof. The preparation method comprises the following steps: adding homopolymerized polypropylene and organic-inorganic composite β-nucleating agent-reinforced particles into an extruder for uniform melt blending, then extruding into a mold, rapidly quenching to an isothermal crystallization temperature at a rate of 30 to 60°C / min under a pressure of 5 to 20MPa for β-crystallization reaction, and then cooling to room temperature to obtain a low melt index and low shrinkage PPH sheet. The organic-inorganic composite β-nucleating agent-reinforced particles are obtained by cross-linking an acid-terminated prepolymer obtained by a catalytic reaction of diamino-terminated polydimethylsiloxane and a dibasic acid through an amino-modified inorganic nucleating agent. The PPH sheet of the present invention can significantly enhance its acid and alkali resistance and physical properties by using specific organic-inorganic composite β-nucleating agent-reinforced particles for β-crystallization reaction and enhanced modification.

The invention discloses a high-strength and high-toughness PPS engineering plastic and a preparation method thereof, and belongs to the technical field of PPS engineering plastics, the high-strength and high-toughness PPS engineering plastic comprises the following raw materials by mass: 40-70 parts of PPS resin, 20-50 parts of glass fiber, 1-15 parts of phenoxy resin, 0.1-1 part of an antioxidant, 1-4 parts of a nucleating agent, 0.1-1 part of a lubricant, and 0.5-2 parts of a silane coupling agent. Wherein a flexible polyether chain segment in the phenoxy resin can effectively relieve the inherent brittleness problem of the PPS resin, has relatively good compatibility with the PPS resin, and also can be used as a chain extender to improve the molecular weight of the PPS resin, so that the modulus and the thermal deformation temperature of the material are improved from all aspects. The nucleating agent is compounded by the organic nucleating agent and the inorganic nucleating agent, the nucleating effect of the phenoxy resin can be better promoted by adding the organic nucleating agent, and the effect of the inorganic nucleating agent is amplified, so that the thermal stability of the system can be better improved.

This invention discloses a method for reinforcing and toughening recycled PET using waste rock wool and epoxidized natural rubber, belonging to the field of functional polymers. The invention synthesizes modified rock wool by grafting epoxidized natural rubber onto the surface of waste rock wool fibers, and strengthens the phase interface between the modified rock wool and PET by utilizing the reaction of epoxy residues with recycled PET at a melting temperature, ultimately forming a multiphase, multi-layered structure of rigid rock wool fiber-flexible natural rubber-rigid PET. The resulting composite material exhibits improved impact strength and tensile strength.

The application discloses a wear-resistant and high-temperature-resistant polyester fiber and a preparation method thereof, and belongs to the technical field of polyester processing, and is used for solving the technical problem that the wear resistance and high-temperature resistance of the polyester fiber in the prior art need to be further improved, and specifically comprises the following steps: adding modified PET, modified filler and auxiliary additive into a double-screw extruder, melt-extruding, spinning, and obtaining a polyester fiber precursor; the application is characterized in that an epoxy group is modified on a carboxylated carbon nanotube through a free radical polymerization reaction to obtain a modified filler, and the modified filler, the auxiliary additive and the modified PET are melt-spun together to obtain the polyester fiber precursor, a modified antibacterial agent is prepared through a coprecipitation method, an antibacterial liquid is further prepared, and the polyester fiber precursor is immersed in the antibacterial liquid to obtain the polyester fiber, so that the wear resistance and high-temperature resistance of the polyester fiber are improved, and the antibacterial performance of the polyester fiber is also improved.