End-functionalized rubber as well as preparation method and application thereof

A technology of end-group functionalization and rubber, which is applied in the field of preparation of functionalized rubber, and can solve the problems of affecting the rubber modification effect, single function, and reducing the efficiency of end-group functionalization end-capping, etc.

Active Publication Date: 2016-10-12
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems that have not been solved. First, most of the end-capping agents used contain only one functional group, which has a single function, especially the weak binding force with white carbon black.
Second, the existing synthetic methods are prone to produce by-products such as dimers and polymers, which reduces the efficiency of end-group functionalization and affects the modification effect of rubber. Therefore, it is necessary to develop new end-capping agents and end-group Functionalized rubber synthesis method to reduce motion hysteresis and improve compatibility with carbon black / white carbon black, thereby improving tire wet skid resistance and reducing rolling resistance

Method used

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  • End-functionalized rubber as well as preparation method and application thereof
  • End-functionalized rubber as well as preparation method and application thereof
  • End-functionalized rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Synthesize according to the method for comparative example 4, the difference is that the design molecular weight is 100000, after the polymerization reaction, in molar ratio DPE / n-(C 4 h 9 ) Li=1.1, add DPE, react for 30 minutes, and then add end-capping agent TEOS for end-capping. The GPC spectra of SSBR before and after capping are as follows Image 6 shown. The corresponding number-average molecular weights are 103964 and 108365, respectively, and the end-capping efficiency is calculated to be 83.11%.

[0077] Compared with Comparative Example 4, the GPC spectra before and after capping all present a single peak, and the peak shape is basically unchanged (the small peak is caused by oxygen coupling), indicating that after the capping agent DPE is capped, then adding TEOS capped SSBR can Eliminate side reactions such as dimerization.

Embodiment 2

[0079] Synthesize according to the method for comparative example 5, the difference is that the design molecular weight is 100000, after the polymerization reaction, by molar ratio DPE / n-(C 4 h 9 ) Li=1.2, add DPE, react for 30 minutes, and then add end-capping agent DTEOS for end-capping. The GPC spectra of SSBR before and after capping are as follows Figure 7 shown. The corresponding number-average molecular weights are 118322 and 119784, respectively, and the end-capping efficiency is calculated to be 78.9%.

[0080] Compared with Comparative Example 5, the GPC spectra before and after capping all present a single peak, and the peak shape is basically unchanged (the small peak is caused by oxygen coupling). Eliminate side reactions such as dimerization.

Embodiment 3

[0082] Synthesize according to the method for comparative example 4, the difference is that the design molecular weight is 100000, after the polymerization reaction, in molar ratio DPE / n-(C 4 h 9 ) Li=1.1 Add DPE, react for 30 minutes, then add end-capping agent GLYME to end-cap. The number-average molecular weights of SSBR before and after capping were 115466 and 118638, respectively, and the capping efficiency was calculated to be 79.6%.

[0083] Similarly, the GPC spectra before and after capping showed a single peak and the peak shape was basically unchanged, indicating that after capping with the capping agent DPE, adding GLYME to cap the SSBR can eliminate side reactions such as dimerization.

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Abstract

The invention discloses end-functionalized rubber as well as a preparation method and an application thereof. According to the method, a polarized organic compound is taken as a modifier, organolithium is taken as an initiator, and conjugated diene or / and vinyl aromatic hydrocarbon is / are initiated to be subjected to anionic polymerization in a hydrocarbon solvent for synthesis of an active polymer; the active polymer is subjected to a reaction with a diphenylethlene capping agent, and a capped active polymer is obtained; the capped active polymer is subjected to a terminating reaction with a novel siloxane-containing aromatic imine terminating agent, and functionalized rubber with a siloxy-amido group as an end group is prepared; finally, the synthesized end-functionalized rubber is mixed with complexing agents including a reinforcing agent, a vulcanizing agent, an accelerant and the like, a rubber composite is prepared and vulcanized, and a rubber material with low rolling resistance, high slipping resistance and other performance is obtained. The end-functionalized rubber synthesized with the method and the rubber material prepared from the end-functionalized rubber have good interaction with carbon black / white carbon black and can be applied to the tire industry.

Description

technical field [0001] The invention belongs to the field of preparation of functionalized rubber. It specifically relates to a method for synthesizing end-group functionalized rubber with high end-capping efficiency by using negative ion technology, the end-group functionalized rubber synthesized by the above-mentioned method, and the preparation of the end-group functionalized rubber with carbon black / silica Rubber compound for tires with good interaction, low rolling resistance and high wet skid resistance. Background technique [0002] At present, my country's automobile production and sales have already ranked first in the world. The high-speed development of the automobile industry has higher and higher requirements for tire performance, and more and more attention has been paid to safety and energy saving. Therefore, tires are required to have high wet skid resistance and low rolling resistance. In the context of saving energy and reducing carbon dioxide emissions, ...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/00C08F8/42C08L15/00C08L91/00C08K13/02C08K3/04C08K3/36
CPCC08F8/00C08F8/42C08L15/00C08L91/00C08K13/02C08K3/04C08K3/36C08F297/04Y02T10/86
Inventor 廖明义李晓燕吴晨静
Owner DALIAN MARITIME UNIVERSITY
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