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A kind of polyolefin/polyisoprene alloy material and preparation method thereof

An isoprene and alloy material technology, applied in the field of polyolefin/polyisoprene alloy material and its preparation, can solve the problems of long crystal transformation time, easy aging, low melting point, etc. sexual effect

Active Publication Date: 2019-10-08
QINGDAO UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the purposes of the present invention is to address the performance defects of current single polyolefins, such as low rigidity and low melting point of polyisoprene, such as poor impact performance, high notch sensitivity, and poor high temperature resistance of polypropylene at room temperature or low temperature. Prominent, easy to age, such as polybutene-1 crystal transformation time is long, pressure resistance is not ideal, etc. The prepared polyolefin / polyisoprene alloy can combine the advantages of each component

Method used

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  • A kind of polyolefin/polyisoprene alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped out and replaced with high-purity nitrogen several times, then metered and added triethylaluminum (Al) and external electron donor diphenyldimethoxysilane (Si ) and MgCl 2 Loaded TiCl 4 Catalyst (Ti content 2.5wt%) 0.28g, add isoprene 0.2Kg, wherein Al / Ti=100 (molar ratio), Al / Si=10 (molar ratio). Stir and polymerize at 30°C for 5 hours, then lower the temperature and empty the isoprene, add 0.2Kg of butene to the reactor, react at 20°C for 1 hour, and obtain 162g of granular polymer directly after the drying is terminated. The properties of the alloy are shown in Table 1.

Embodiment 2

[0055] 1L full-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped and replaced with high-purity nitrogen several times, then metered and added 100ml of n-hexane, triethylaluminum (Al), and external electron donor cyclohexyltrimethoxysilane into the reaction kettle (Si) and MgI 2 Loaded TiCl 4 Titanium catalyst (Ti content 2.5wt%) 0.28g, add isoprene 0.2Kg, wherein Al / Ti=80 (molar ratio), Al / Si=20 (molar ratio). Stir and polymerize at 20°C for 8h, then lower the temperature and empty the isoprene, add 0.2Kg of butene to the reactor, react at 40°C for 0.5h, and obtain 180g of granular polymer directly after the drying is terminated. The properties of the alloy are shown in Table 1.

Embodiment 3

[0057] 1L fully-sealed magnetic stirring stainless steel pressure polymerization kettle, pumped out and replaced with high-purity nitrogen for several times, then metered and added 150ml of n-heptane, triethylaluminum (Al), external electron donor diphenyl dimethyl Oxysilane (Si) and MgCl 2 Load VCl 3 Catalyst (V content 3.5wt%) 1.0g, add isoprene 0.5Kg, wherein Al / V=60 (molar ratio), Al / V=5 (molar ratio). Stir and polymerize at 35°C for 10h, then lower the temperature and empty the isoprene, add 2.0Kg of butene to the reactor, react at 60°C for 0.5h, and obtain 1.783Kg of granular polymer directly after the drying is terminated. The properties of the alloy are shown in Table 1.

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Abstract

The invention discloses a polyolefin alloy material and a preparation method thereof, belongs to the field of polyolefin materials and particularly relates to a polyolefin / polyisoprene alloy material as well as a preparation method and application thereof. In a polyolefin / polyisoprene alloy, the mass content of polyolefin is 5 to 99.4 percent, and the isotacticity is greater than 85 weight percent; the mass content of polyisoprene is 0.5 to 85 percent; the mole content of a trans-1,4 structure is greater than 85 percent, and the mass content of a block copolymer is 0.1 to 10 percent. The polyolefin / polyisoprene alloy material synthesized by adopting supported titanium and / or a vanadium catalyst through a two-segment polymerization method, disclosed by the invention, is a granular product with a core-shell structure, has the characteristics of high strength and high toughness, and is a novel polyolefin material.

Description

technical field [0001] The invention belongs to the technical field of novel polyolefin materials, in particular to a polyolefin / polyisoprene alloy material and its preparation method and application. Background technique [0002] High trans-1,4-polyisoprene (TPI) is a hard semi-crystalline polymer material with high tensile modulus, yield stress and high elongation at break. The trans-1,4 structure is easy to crystallize, which endows TPI with many unique and excellent properties. For example, high-trans polyisoprene can be used as shape memory functional materials, medical materials, plastics and modified rubber materials, etc. Chinese patent (publication number: CN1117501), Chinese patent (publication number: CN1847272) and Chinese patent (publication number: CN103265654A) disclose the preparation method of TPI, the prepared TPI is easy to crystallize or crystallinity height (more than 30%), at room temperature The bottom is clean hard plastic, its performance is simila...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/20C08L47/00C08L23/12C08F110/06C08F110/08C08F136/08C08F4/646
Inventor 贺爱华马韵升王书磊邵华锋栾波王日国姚刚
Owner QINGDAO UNIV OF SCI & TECH
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