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Preparation method of olefin block copolymer (OBC) through melt grafting of acrylic acid (AA)

A technology of octene block and grafted ethylene, which is applied in the field of preparation of acrylic acid melt-grafted ethylene-octene block copolymer, can solve the problems of poor compatibility of direct blending and decreased mechanical strength of alloy materials, and achieve a gap Improved impact strength, improved elongation at break, and improved impact toughness

Active Publication Date: 2014-05-07
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects such as the poor compatibility of direct blending of OBC and polyethylene terephthalate (PET) and the decrease of the mechanical strength of the alloy material produced, the invention provides an acrylic acid melt-grafted ethylene-octene The preparation method of block copolymer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Set the density to 0.877g / cm 3 , OBC 93kg with a melt mass flow rate of 1.0g / 10min, a tensile strength of 13MPa, and a break elongation of 1300%, AA 3.5 with a mass percentage of 99.5%, a melting point of 14°C, and a relative density of 1.05 ㎏, BPO 0.2㎏ Put it in a mixer, control the speed of the mixer to 120r / min, temperature 30°C, stir and mix for 3 minutes to form a mixture; put the mixture in an internal mixer, control the speed of the mixer to 70r / min, and temperature 166°C , after 8 minutes of melt grafting reaction, add 0.3 kg of tris(2,4-di-tert-butylphenyl) phosphite, and continue banburying for 4 minutes to form a colloidal material; put the colloidal material in the hopper of the counter-rotating twin-screw extruder The barrel temperature of the counter-rotating twin-screw extruder is controlled to be 145°C in zone I, 152°C in zone II, 158°C in zone III, 162°C in zone IV, and 159°C in zone V. The temperature of the die head of the counter-rotating twin-screw ...

Embodiment 2

[0020] Set the density to 0.877g / cm 3 , OBC 96kg with a melt mass flow rate of 1.0g / 10min, a tensile strength of 13MPa, and a break elongation of 1300%, AA 6.0 with a mass percentage of 99.5%, a melting point of 14°C, and a relative density of 1.05 ㎏, BPO 0.4㎏ Put in a mixer, control the speed of the mixer to 120r / min, temperature 29 ℃, stir and mix for 3 minutes to form a mixture; put the mixture in an internal mixer, control the speed of the internal mixer to 70r / min, temperature 167 ℃ , after 8 minutes of melt grafting reaction, add 0.6 kg of tris(2,4-di-tert-butylphenyl) phosphite, and continue banburying for 4 minutes to form a colloidal material; put the colloidal material in the hopper of the counter-rotating twin-screw extruder The barrel temperature of the counter-rotating twin-screw extruder is controlled to be 143°C in zone I, 150°C in zone II, 160°C in zone III, 163°C in zone IV, and 161°C in zone V. The temperature of the die head of the counter-rotating twin-scre...

Embodiment 3

[0025] Set the density to 0.877g / cm 3 , OBC 94.5kg with a melt mass flow rate of 1.0g / 10min, a tensile strength of 13MPa, and an elongation at break of 1300%, AA 4.8 with a mass percentage of 99.5%, a melting point of 14°C, and a relative density of 1.05 ㎏, BPO 0.3㎏ Put in a mixer, control the speed of the mixer to 120r / min, temperature 31 ℃, stir and mix for 3 minutes to form a mixture; put the mixture in an internal mixer, control the speed of the internal mixer to 70r / min, temperature 165 ℃ , after 8 minutes of melt grafting reaction, add 0.45 kg of tris(2,4-di-tert-butylphenyl) phosphite, and continue banburying for 4 minutes to form a colloidal material; put the colloidal material in the hopper of the counter-rotating twin-screw extruder The barrel temperature of the counter-rotating twin-screw extruder is controlled to be 148°C in zone I, 155°C in zone II, 157°C in zone III, 160°C in zone IV, and 158°C in zone V. The temperature of the die head of the counter-rotating tw...

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Abstract

The invention relates to a preparation method of OBC through melt grafting of AA. The method includes taking 93-96 parts by weight of OBC as a basic material; adding, by weight, 3.5-6.0 parts of AA, 0.2-0.4 parts of dibenzoyl peroxide and 0.3-0.6 parts of tris (2, 4- di-tert-butyl phenyl) phosphite esters; and obtaining AA grafted OBC (OBC-g-AA) through twin-screw extrusion and granulating after stirring and mixing, and banburying and the melt grafting reaction. The prepared OBC-g-AA has a grafting ratio of 1.25%-1.45% and can serve as a compatilizer of a blend alloy material of polyethylene terephthalate (PET) and OBC so as to prepare a PET / OBC / OBC-g-AA alloy material. Compared with the pure PET, the PET / OBC / OBC-g-AA has the advantages that the elongation at break is improved by 235%-273%, the notched impact strength is improved by 65%-85%, and the anti-impact toughness is improved substantially.

Description

technical field [0001] The invention relates to a preparation method of an ethylene-octene block copolymer graft, in particular to a preparation method of an acrylic acid melt-grafted ethylene-octene block copolymer. Background technique [0002] Ethylene-octene block copolymer (OBC) is an olefin elastomer developed and produced by Dow Chemical Company in the United States. The "hard" and "soft" segments in the OBC molecular chain are arranged alternately. Compared with ethylene-octene copolymer, its heat resistance High temperature, good wear resistance, comprehensive mechanical properties are obviously better than other polyolefin elastomers, and the application prospect is relatively broad. [0003] Since OBC is a non-polar polymer, directly blended with polyethylene terephthalate (PET) containing polar groups, the compatibility is poor, and the mechanical strength of the alloy material is reduced. Therefore, the melt grafting modification of OBC and the introduction of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F287/00C08F220/06C08K5/524C08L67/02C08L51/06B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 张华集曾丽张雯肖荔人陈晓
Owner FUJIAN NORMAL UNIV