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Polyolefin containing hindered phenol-structured novel silane coupling agent modified ardealite and preparation method of polyolefin

A technology of silane coupling agent and hindered phenol, which is applied in the field of modified polyolefin and its preparation, can solve the problems of not being able to suppress the breakage of polyolefin molecular chains, the difficulty of dispersing antioxidants and inorganic fillers, and the problems of antioxidants and inorganic fillers. Inorganic fillers are difficult to mix evenly, so as to achieve the effect of reducing surface energy, avoiding uneven dispersion and reducing the process

Inactive Publication Date: 2018-08-24
李翌晨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when inorganic fillers are added to polyolefins, the antioxidant, inorganic fillers, and polymer matrix form a multiphase system, and the dispersion of antioxidants and inorganic fillers is difficult to solve, which affects the performance of polymers.
At the same time, in the process of polyolefin processing, it is usually necessary to modify the inorganic filler with various modifiers first, and then add antioxidants during the processing to prevent the oxidation of the polymer during processing and use. Therefore, filler modification Adding antioxidant is an independent process. It is difficult to mix the antioxidant and inorganic filler evenly, and the oxidative fracture of polyolefin around the filler is often the most serious. Therefore, adding antioxidant sometimes cannot well inhibit the polyolefin around the filler. ene molecular chain scission

Method used

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  • Polyolefin containing hindered phenol-structured novel silane coupling agent modified ardealite and preparation method of polyolefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Benzyl chloride hindered phenol The preparation is the same as the CN104744813A method.

[0023] (2) Synthesis of hindered phenol new silane coupling agent: in N 2 Under protection, add 10 parts of the above synthesized benzyl chloride hindered phenol, 5 parts of dimethylsulfoxide, 10 parts of diethylaminomethyltriethoxy silane The oil temperature rises to 80°C, reacts for 10-48 hours, washes with 20 parts of petroleum ether, and vacuum-dries at 30°C for 12 hours to obtain a hindered phenol new silane coupling agent, recovers the solvent by fractional distillation, and marks it as a hindered phenol new silane coupling agent 1

[0024] Infrared analysis (FT-IR, figure 1 ) and thermogravimetric (TG, figure 2 )analyze. right figure 1 analyzed by figure 1 The curves a and b show that the wave number is 2980cm -1 The left and right peaks are the stretching vibration peaks of H on the benzene ring, and the wave number in curve b is 746.5cm -1 It is the chara...

Embodiment 2

[0031] The difference between this example and Example 1 is that in the synthesis step (1) of hindered phenol new silane coupling agent 1, the temperature is changed to 90°C, the reaction time is 8h, and diethylaminomethyltriethoxysilane is changed to 12 parts, the amount of solvent is 10 parts, and 40 parts of petroleum ether. The vacuum drying temperature is 25°C, and the drying time is 14h; (2) The processing ingredients are changed to add 0.25 parts of hindered phenol new silane coupling agent to 30 parts by mass of phosphogypsum, and the modification process is high-speed stirring at 70°C for 20 minutes.

[0032] The thermal and oxidative aging properties are shown in Table 1. It can be seen from Table 1 that after adding 0.25 parts of hindered phenol new silane coupling agent modified phosphogypsum random copolymerized polypropylene, after extruding different times, the melt index increased slightly, but the change was not large, indicating random The molecular chain of...

Embodiment 3

[0035] The difference between this implementation and Example 1 is that in the synthesis step (1) of hindered phenol new silane coupling agent 1, the temperature is changed to 100°C, the reaction time is 12h, and the amount of diethylaminomethyltriethoxysilane is 15 parts , the solvent was changed to 20 parts of toluene and 50 parts of petroleum ether. The vacuum drying temperature is 45°C, and the drying time is 10h; (2) The processing ingredients are changed to add 0.1 part of hindered phenol new silane coupling agent 1 to 30 parts by mass of phosphogypsum, and the modification process is high-speed stirring at 80°C for 25 minutes .

[0036] The thermal and oxidative aging properties are shown in Table 1. It can be seen from Table 1 that after adding 0.1 parts of hindered phenol new silane coupling agent 1 to modify the random copolymer polypropylene of phosphogypsum, the melt index increased slightly after extrusion for different times, but the change was not large, indica...

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Abstract

The invention discloses polyolefin containing hindered phenol type novel silane coupling agent modified ardealite. Polyolefin is characterized in that 0.1-1 part of a hindered phenol-structured novelsilane coupling agent is added to 30-40 parts by mass of ardealite, the mixture is stirred at high speed at 60-80 DEG C for 20-30 min, then 100 parts by mass of polyolefin is added, the mixture is stirred continuously for 30 min, extrusion is performed by a twin-screw extruder, and a product is obtained.

Description

technical field [0001] The invention relates to a modified polyolefin and a preparation method thereof, in particular to a novel silane coupling agent-modified polyolefin containing hindered phenol and a preparation method thereof. Background technique [0002] Polyolefin is a polymer compound formed by polyaddition reaction of olefin. Such organic polymers are usually polymerized from many identical or different simple olefins (such as polypropylene, polyethylene, etc.), and the molecular chains of polyolefin molecules exhibit significant non-polar phenomena. Phosphogypsum refers to the solid waste generated when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid, and its main component is calcium sulfate. Phosphogypsum is an industrial waste with extremely low cost. Using phosphogypsum as a filler can significantly reduce the cost of polymers. However, since phosphogypsum is a polar molecule, adding phosphogypsum fillers will easily cause ...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K3/30C08L23/14C08L23/06C08L25/06C07F7/18
CPCC08K9/06C07F7/1892C08K3/30C08K2003/3045C08L23/14C08L23/06C08L25/06
Inventor 李翌晨
Owner 李翌晨
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