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Polarized isobutylene-based polymer and its preparation method

A technology of isobutylene polymer and isobutylene base, applied in the field of polyolefin, to achieve the effect of large grafting amount, improving polarity and obvious difference

Active Publication Date: 2021-05-25
北京引发科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, by using an environmentally friendly catalyst, it is possible to produce highly efficient graft modification that suppresses the occurrence of side reactions (such as water initiation) during the reaction process, which has not been reported yet.

Method used

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  • Polarized isobutylene-based polymer and its preparation method
  • Polarized isobutylene-based polymer and its preparation method
  • Polarized isobutylene-based polymer and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] At -30°C, add 10 mL of PVC / dichloroethane solution (concentration: 0.03 g / mL, M w,PVC =99kg / mol, PDI=2.4) and 10mL of isobutene / dichloromethane (concentration: 2mol / L), the concentration of isobutene in the reaction system is 1mol / L. With stirring, add the solution containing iPrOH and FeCl 3 The mixed solution initiates the polymerization reaction, so that PVC, FeCl 3 , The molar ratio of iPrOH to isobutene is 2.5×10 -4 : 2.6×10 -2 : 3.6×10 -2 :1. Polymerize for 30 minutes, then add 2 mL of ethanol solution to terminate the reaction; after termination, the reaction system is dissolved in hexane and precipitated in ethanol in sequence, and washed three times to remove residual monomers, FeCl 3 After waiting, vacuum-drying at 40° C., the dried polarized isobutylene-based polymer can be obtained with a yield of 83%. The absolute weight-average molecular weight (M w ) is 140kg / mol, molecular weight distribution index (M w / M n ) is 4.0, and the polyisobutylene mas...

Embodiment 2

[0039] At -80°C, add 5mL PVC / dichloroethane solution (concentration: 0.04g / mL, M w,PVC =99kg / mol, PDI=2.4) and 25mL of isobutene / dichloromethane (concentration: 1mol / L), the concentration of isobutene in the reaction system is 0.83mol / L. With stirring, add the solution containing iPrOH and FeCl 3 The mixed solution initiates the polymerization reaction, in which PVC, FeCl 3 , The molar ratio of iPrOH to isobutene is 1.7×10 -4 : 1.0×10 -2 : 1.4×10 -2 :1. Polymerization reaction 10min. Termination reaction and aftertreatment method are the same as embodiment 1. Obtain the polarized isobutylene-based polymer after drying, yield is 83%, absolute weight-average molecular weight (M w ) is 124kg / mol, M w / M n is 1.4, and the mass content of polyisobutylene is 26%.

Embodiment 3

[0041] Add 20g PVC (M w,PVC =98kg / mol, PDI=1.8) and 1L dichloroethane, dissolved. Mix with 97 mL of isobutene at -30°C, and the concentration of isobutene in the reaction system is 1.0 mol / L. With stirring, add the solution containing iPrOH and FeCl 3 The mixed solution initiates the polymerization reaction, in which PVC, FeCl 3 , The molar ratio of iPrOH to isobutene is 4.8×10 -4 : 1.6×10 -2 : 2.24×10 -2 :1. Polymerization reaction 120min. Termination reaction and aftertreatment method are the same as embodiment 1. The polarized isobutylene-based polymer after drying was obtained with a yield of 36%. The absolute weight-average molecular weight (M w ) is 602kg / mol, M w / M n It is 2.1, and the mass content of polyisobutylene is 59%.

[0042] The cross-sectional SEM image of the above-mentioned polarized isobutylene-based polymer is as follows figure 1 As shown, it shows that a uniform and ordered phase separation structure is formed inside the polymer, resulting i...

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Abstract

The invention belongs to the field of polyolefins, and relates to a polarized isobutylene-based polymer and a preparation method thereof. The polarized isobutene-based polymer is an isobutene-based polymer connected with multiple polyvinyl chloride segments, the content of the isobutene-based polymer is 26-80 wt%, and the weight-average weight of the polarized isobutene-based polymer is The molecular weight is 105-800kg / mol, and the molecular weight distribution index is 1.2-5.0. The present invention realizes the graft copolymerization of isobutylene on polyvinyl chloride in a relatively large grafting amount range, and obtains a copolymerization product with a high grafting amount, which not only improves the polarity of the isobutylene-based polymer material, but also improves the polyvinyl chloride. The processability of vinyl chloride, more importantly, can be used to increase the blending compatibility of the two polymers, greatly improving the mechanical properties of the blend and other properties.

Description

technical field [0001] The invention belongs to the field of polyolefins, and more specifically relates to a polarized isobutylene-based polymer and a preparation method thereof. Background technique [0002] As a general-purpose plastic, polyolefins are widely used in industries such as daily necessities, packaging, automobiles, construction, and household appliances. However, polyolefins such as polyethylene and polypropylene are non-polar and crystalline, which makes them less compatible with other materials. At the same time, their dyeability, adhesion, antistatic and hydrophilic properties are also poor. Thus affecting the further popularization and application of polyolefins in some fields. See: G. Natta, G. Mazzanti, P. Longi, Isotactic polymers of silicon-containing vinyl monomers. Journal of Polymer Science Part A: Polymer Chemistry, 2010, 31:424-426. Functionalizing non-polar polyolefins, that is, introducing polar functional groups or polymer segments into their...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F259/04C08F210/10C08F236/08
CPCC08F259/04C08F210/10C08F236/08
Inventor 吴一弦杜杰王楠张彦君张树
Owner 北京引发科技有限公司
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