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Preparation method of rare earth coordination crosslinking rubber

A coordination cross-linking and rare earth technology, applied in the field of preparation of thermoplastic rare earth coordination cross-linking rubber, can solve the problems of poor comprehensive mechanical properties of non-covalent cross-linking rubber

Inactive Publication Date: 2010-07-21
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By adopting the method of the present invention, by optimizing the formula design, thermoplastic coordination cross-linked rubbers with comprehensive mechanical properties equivalent to or better than corresponding thermosetting rubbers can be prepared, solving the technical problem that non-covalent cross-linked rubbers have poor comprehensive mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the internal mixer, add 100g butadiene rubber (Qilu Petrochemical Co., Ltd.), 80g polyvinyl chloride (PVC, Qilu Petrochemical Co., Ltd.), 5g calcium zinc stabilizer (Nanjing Jinling Chemical Plant) and 20g styrene-butadiene - Styrene (SBS, Sinopec Baling Petrochemical Co., Ltd.), plasticized and mixed evenly at 145°C, and made into a blended modified rubber after 15 minutes.

[0022] Quickly add 22g of lanthanum oxide, 20g of sebacic acid and 0.05g of N-cyclohexyl-2-benzothiazole sulfenamide (CZ) to the above-mentioned blended modified compound, mix evenly, heat to 150°C, and speed up the mixing process. Refining for 10 minutes, stop mixing and let stand for 3 minutes, quickly raise the temperature to 200°C, continue to mix for 12 minutes, stop mixing and let stand for 7 minutes. After discharging and cooling, the reversible coordination cross-linked polymer can be prepared. The physical parameters characterized by sample preparation are: tensile strength of 16.2MP...

Embodiment 2

[0024] The preparation steps are the same as in Example 1, except that N-cyclohexyl-2-benzothiazole sulfenamide is not added. The physical parameters characterizing the sample are: tensile strength of 14.1MPa, elongation at break of 420%, hardness (Shore A) of 61, and tear strength of 36KN / m.

Embodiment 3

[0026] The preparation steps are the same as in Example 1, except that styrene-butadiene-styrene is not added. The physical parameters characterizing the sample are: tensile strength of 15.9MPa, elongation at break of 464%, hardness (Shore A) of 68, and tear strength of 43KN / m.

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Abstract

The invention relates to a rare earth coordination crosslinking rubber and a preparation method thereof. The invention is characterized by (1) uniformly mixing 1-100 parts by weight of thermoplastic resin with polar functional groups, 100 parts by weight of rubber resin and 1-30 parts by weight of compatilizer for 5-25 min at the temperature of 30-260 DEG C in a mixing device of an open mill, an internal mixer or an extruder into a blending modified sizing material; and (2) adding a rare earth coordination crosslinking agent and a vulcanizing agent into the blending modified sizing material, uniformly mixing, heating to 150-190 DEG C, quickly mixing for 210min, stopping mixing and standing still for 0.5-3min; and then rapidly heating up to 200-240 DEG C, continuing to mix for 9min-12min, stopping mixing and then obtaining the rare earth coordination crosslinking rubber after standing still for 5-7min. With the method, the thermoplastic coordination crosslinking rubber with the comprehensive mechanical property equivalent to or superior to that of corresponding thermoset rubber can be prepared via optimized formula design, and the technical problem that the comprehensive mechanical properties of the non-covalent cross-linking rubbers are poorer is solved.

Description

technical field [0001] The invention relates to a method for preparing rubber, in particular to a method for preparing thermoplastic rare earth coordination crosslinked rubber. Background technique [0002] So far, covalent crosslinking is the most effective way to prevent chain slippage and make rubber highly elastic and useful. However, covalently crosslinked bonds are irreversible, and covalently crosslinked rubber is thermosetting. Negative problems such as environmental pollution and ecological damage caused by the waste of a large amount of thermosetting rubber are becoming more and more serious. Designing thermoplastic rubber and effectively replacing thermosetting rubber can realize the recycling of rubber and greatly reduce the negative impact brought by the rubber industry. [0003] Since the discovery of thermoplastic elastomer (TPE) in the 1940s, humans have developed four types of thermoplastic rubber. The difference from covalently crosslinked thermosetting r...

Claims

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Application Information

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IPC IPC(8): C08L9/00C08L27/06C08L53/02C08L9/02C08L23/16C08L77/02C08L77/06C08L23/28C08L55/02C08L51/06C08K13/02C08K3/22C08K5/092C08K5/47C08K5/098C08J3/24
Inventor 陈庆华陈荣国房小明肖荔人刘欣萍许兢钱庆荣
Owner FUJIAN NORMAL UNIV
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