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Method for preparing polyethylene terephthalate (PET) blend

A technology of polyethylene terephthalate and blends, which is applied in the field of preparation of polyethylene terephthalate blends, can solve the problems of low grafting rate, easy crosslinking of macromolecules, Problems such as poor performance of grafts, to achieve the effect of high grafting rate, low requirements for production equipment, and good fluidity

Inactive Publication Date: 2013-06-19
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defects existing in the current PET impact modifier POE grafting technology: the grafting rate is not high; macromolecules are easy to cross-link during the grafting process, and the performance of the graft is poor

Method used

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  • Method for preparing polyethylene terephthalate (PET) blend
  • Method for preparing polyethylene terephthalate (PET) blend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix 100 parts of ethylene-1-octene copolymer (Mitsui TAFERM, DF610), 3 parts of glycidyl methacrylate, 3 parts of styrene, 0.15 parts of dicumyl peroxide, and 1 part of triphenyl phosphite Uniform, extruded by a twin-screw extruder, stretched, cooled, and pelletized to obtain a grafted product. The process parameters are: twin-screw extruder, diameter 36mm, aspect ratio L / D 40, speed: 55r / min; the temperature of each section of the extruder is: Section I: 100°C; Section II: 175°C; Section III Segment: 180°C, Segment IV: 180°C; Segment V: 180°C; Segment VI: 180°C; Segment VII: 175°C. The obtained glycidyl methacrylate grafted polyolefin elastomer has a graft rate of 0.93% and a melt index of 0.84g / 10min.

[0032] After the obtained glycidyl methacrylate grafted polyolefin elasticity and PET are proportioned according to the formula (mass fraction) in Table 1, they are melt-extruded through a twin-screw extruder. The process parameters are: twin-screw extruder, diameter ...

Embodiment 2

[0034] Mix 100 parts of ethylene-1-octene copolymer (Mitsui TAFERM, DF610), 5 parts of glycidyl methacrylate, 3 parts of styrene, 0.15 parts of dicumyl peroxide, and 1 part of triphenyl phosphite Uniform, extruded by a twin-screw extruder, stretched, cooled, and pelletized to obtain a grafted product. The process parameters are: twin-screw extruder, diameter 36mm, aspect ratio L / D 40, speed: 55r / min; the temperature of each section of the extruder is: Section I: 100°C; Section II: 175°C; Section III Segment: 180°C, Segment IV: 180°C; Segment V: 180°C; Segment VI: 180°C; Segment VII: 175°C. The obtained glycidyl methacrylate grafted polyolefin elastomer has a graft rate of 1.25% and a melt index of 0.65 g / 10 min.

[0035] After the obtained glycidyl methacrylate grafted polyolefin elasticity and PET are proportioned according to the formula (mass fraction) in Table 1, they are melt-extruded through a twin-screw extruder. The process parameters are: twin-screw extruder, diamete...

Embodiment 3

[0037] Mix 100 parts of ethylene-1-octene copolymer (Mitsui TAFERM, DF610), 5 parts of glycidyl methacrylate, 5 parts of styrene, 0.15 parts of dicumyl peroxide, and 1 part of triphenyl phosphite Uniform, extruded by a twin-screw extruder, stretched, cooled, and pelletized to obtain a grafted product. The process parameters are: twin-screw extruder, diameter 36mm, aspect ratio L / D 40, speed: 55r / min; the temperature of each section of the extruder is: Section I: 100°C; Section II: 175°C; Section III Segment: 180°C, Segment IV: 180°C; Segment V: 180°C; Segment VI: 180°C; Segment VII: 175°C. The obtained glycidyl methacrylate grafted polyolefin elastomer has a graft rate of 1.20% and a melt index of 0.70 g / 10 min.

[0038] After the obtained glycidyl methacrylate grafted polyolefin elasticity and PET are proportioned according to the formula (mass fraction) in Table 1, they are melt-extruded through a twin-screw extruder. The process parameters are: twin-screw extruder, diameter ...

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Abstract

The invention discloses a method for preparing polyethylene terephthalate (PET) blend. Glycidyl methacrylate (GMA) is used as grafting monomer, comonomer, initiator and inhibiting crosslinker are added to the grafting monomer, polyolefin elastomer (POE) is molten and grafted on a twin-screw extruder to prepare POE-g-(GMA-co-St) which has high grafting ratio and good fluidity, and the POE-g-(GMA-co-St) and the PET are molten and blended to effectively improve the impact resistance of the PET. The method for preparing the PET blend has low requirement for the production equipment, has high efficiency and is convenient for the production of the PET blend on a large scale, and the high-impact resistant PET blend has good impact resistance and a certain degree of rigidity.

Description

technical field [0001] The invention relates to a preparation method of a polyethylene terephthalate blend, in particular to a method for preparing a high-impact polyethylene terephthalate blend using a multi-component melt grafting technique method. Background technique [0002] PET (polyethylene terephthalate) is a very important thermoplastic engineering plastic, with excellent mechanical properties, electrical properties, heat resistance, chemical corrosion resistance, etc., widely used in automobiles, electronics and food and other industries. However, unmodified PET has slow crystallization rate, poor molding processability and low impact strength, thus limiting its further application. [0003] In order to improve the impact resistance of PET, a lot of research has been done on PET / functionalized elastomer blend system at home and abroad. Plastic Industry 200836(12): 17-20, China Plastics 200418(3): 20-22, Chinese Patent CN1238356A, JOURNALOF POLYMER RESEARCH 2005 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L51/06C08F255/08C08F255/10C08F220/32C08F212/08C08F220/14C08K5/526C08K5/20B29B9/06B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 曾幸荣曹娟娟赖学军李红强徐迎宾
Owner SOUTH CHINA UNIV OF TECH