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Method for preparing functionalization polyolefin resin

A polyolefin resin, functionalization technology, applied in the field of preparation of functionalized polyolefin resin, can solve problems such as deterioration of mechanical properties or processing performance, uneven distribution of free radical concentration, difficulty in controlling free radical concentration and lifespan, etc.

Inactive Publication Date: 2004-03-17
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the decomposition rate of organic peroxides is affected by the chemical structure of the peroxide and the processing temperature, it is difficult to control the concentration and lifespan of free radicals generated; due to the incompatibility of organic peroxides and polyolefin resins, organic peroxides Oxide cannot be uniformly dispersed in the resin, resulting in uneven distribution of free radical concentration in the system
Therefore, there are following disadvantages in the functionalized polyolefin resin prepared with organic peroxide as initiator; grafting rate and grafting efficiency are low, functional monomers are prone to homopolymerization, and polyolefin resin molecular chains are prone to degradation (mainly containing Polyolefin resins with tertiary carbon atoms, such as polypropylene, etc.) or cross-linking (the molecular chain is mainly composed of secondary carbon atoms, such as polyethylene, etc.), resulting in poor mechanical properties or processing properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] With 100 parts (weight) of linear low density polyethylene (LLDPE), the melt flow rate is 2.0g / 10min, and the density is 0.918g / cm 3 , pre-irradiated with γ-rays on a Co-60 device, and the irradiation dose was 20Gy-200KGy. Premix the pre-irradiated polyethylene with 0.5-15 parts of glycidyl methacrylate, 0.05-5 parts of p-benzoquinone and 0.05-5 parts of thionyl hydrazide in a drum mixer for 10 minutes. The above premixed material is transported to a reactive twin-screw extruder for extrusion reaction graft copolymerization. The screw diameter of the extruder is 70mm, the length / diameter ratio is 48, and the reaction extrusion temperature is 110-250°C. The reactants are extruded through a die, cooled, and pelletized to obtain finished products. The obtained functionalized LLDPE has a graft rate of 0.2-10%, a melt flow rate of 1.0-1.6g / 10min and no gel. The film blowing test is carried out on the product with a film blowing unit, and the film thickness can be adjusted...

Embodiment 2

[0032] 100 parts (weight) of high-density polyethylene (HDPE), melt flow rate 1.2g / 10min, density 0.942g / cm 3 , Pre-irradiate with high-energy electron beams on the electron accelerator device, and the irradiation dose is 20Gy-200KGy. Mix the pre-irradiated HDPE with 0.2-10 parts of maleic anhydride, 0.05-5 parts of triphenyl phosphate and 0.05-5 parts of caprolactam in a high-speed mixer for 10 minutes. The above premixed material was transported to a reactive Banbury mixer for reactive graft copolymerization. The volume of Banbury is 500 liters, the reaction temperature is between 120-200°C, and the reaction time is 5-15 minutes. The reactant is extruded, cooled and pelletized to obtain the finished product. The prepared functionalized HDPE has a graft rate of 0.12-7%, a melt flow rate of 0.8-1.0g / 10min and no gel. The film blowing test is carried out with a film blowing unit, and the film thickness can be adjusted between 0.01-0.50mm. The peel strength between the mater...

Embodiment 3

[0034] 100 parts (weight) of polypropylene (PP), melt flow rate 3.3g / min, density 0.902g / cm 3 , the tensile strength is 32.0MPa, the elongation at break is 500%, and the impact strength is 6.2KJ / m 2, Pre-irradiate with high-energy electron beams on the electron accelerator device, and the irradiation dose is 20Gy-200KGy. The pre-irradiated PP was mixed with 0.5-15 parts of acrylic acid, 0.05-5 parts of triphenyl phosphite, and 0.05-5 parts of butanone in a Henschel mixer for 5 minutes. The above premixed material is transported to a reactive single-screw extruder for reactive graft copolymerization. The diameter of the extruder is 90mm, the compression ratio is 2.50, the length / diameter ratio is 48, and the reaction temperature is 160-220°C. The reactant is extruded, cooled and pelletized to obtain the finished product. The grafting rate of the prepared functionalized PP is 0.25-10%, the melt flow rate is 3.5-5.5g / 10min, the tensile strength is 28.9-31.5MPa, the elongation ...

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Abstract

The preparation process of functional polyolefin resin includes electronic beam or gamma-ray pre-irradiation treatment of functional polyolefin resin; mechanical mixing of polyolefin resin after pre-treatment, functional monomer and electron donor reagent; and reacting extrusion for the polyolefin resin in molten state and functional monomer to produce grafting reaction. The polyolefin resin includes polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-styrene copolymer, polystyrene, etc; the functional monomer is unsaturated organic acid or its derivative with amino group, isocyanate, hydroxyl group or other reactive functional group; and the electron donor reagent includes electron-rich compound with P, N, S or O element, p-benzoquinone, triphenyl phosphite, triphenyl phosphate, etc.

Description

technical field [0001] The invention relates to a preparation method of functionalized polyolefin resin. [0002] The invention also relates to the product prepared by this method, in particular the product is a functionalized polyolefin resin. Background technique [0003] Polyolefin resin has many advantages such as easy availability of raw materials, low price, excellent comprehensive physical and mechanical properties, chemical corrosion resistance, non-toxicity, and easy processing. It is widely used in packaging, home appliances, automobiles, decoration, construction and other fields. Because polyolefin resin has no reactive functional groups or polar groups, it has no adhesion to polar materials such as metals, ceramics, and glass, and has no compatibility with polar polymers such as polyamides and polyesters, so that its application range are greatly restricted. [0004] Copolymerizing reactive or polar unsaturated functional monomers with polyolefin resins to prep...

Claims

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Application Information

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IPC IPC(8): C08F255/02
Inventor 殷敬华姚占海宋永贤徐俊
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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