A kind of preparation method of modified polybutyrolactam

A technology for polybutyrolactam and butyrolactam, which is applied in the field of materials, can solve the problems of a wide variety of additives, complicated preparation processes, impure products, etc., and achieves the effects of wide production and application prospects, simple operation, and low equipment requirements.

Active Publication Date: 2022-04-29
EAST CHINA UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a kind of effective preparation process in order to overcome the above-mentioned prior art existing defects such as complicated preparation process, high energy consumption, various kinds of additives, impure product, and negative impact on other properties of the material while lowering the melting point. A method for modifying the thermal properties of polybutyrolactam with simple operation and single product

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  • A kind of preparation method of modified polybutyrolactam
  • A kind of preparation method of modified polybutyrolactam
  • A kind of preparation method of modified polybutyrolactam

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preparation example Construction

[0035] A kind of preparation method of modified polybutyrolactam, concrete steps are as follows:

[0036] (1) Preparation of raw materials: prepare high-molecular-weight linear polybutyrolactam and low-molecular-weight branched polybutyrolactam, wherein the viscosity-average molecular weight of high-molecular-weight linear polybutyrolactam is 2.0×10 4 -6.0×10 4 g / mol; the viscosity-average molecular weight of low molecular weight branched polybutyrolactam is 0.1×10 4 -1.5×10 4 g / mol;

[0037] (1-1) High molecular weight linear polybutyrolactam is prepared by the following method: at 70-120°C, butyrolactam is reacted with a catalyst, including but not limited to potassium tert-butoxide, sodium hydroxide, potassium hydroxide, carbonic acid When the temperature of potassium, sodium carbonate, and activated butyrolactam is lowered to 30-60°C, add an initiator, including but not limited to benzoyl chloride, fumaryl chloride, acetic anhydride, and isocyanate, and react for 8-48 h...

Embodiment 1

[0056] 1. The modification method of polybutyrolactam thermal performance comprises the following steps:

[0057] (1) Preparation of raw materials: Synthesis of high molecular weight linear polybutyrolactam: at 90°C, 50g of butyrolactam was reacted with 2.64g of potassium tert-butoxide for 2 hours, and when the temperature was lowered to 40°C, 1.34ml of benzoyl chloride was added As an initiator, react for 24h to obtain a molecular weight of 4.0×10 4 g / mol linear polybutyrolactam; synthesis of low molecular weight branched polybutyrolactam: at 90°C, 50g butyrolactam was reacted with 4.6g potassium tert-butoxide for 2h, and when the temperature was lowered to 40°C, 1.05 ml1,3,5-benzenetricarbonyl chloride was used as an initiator, and reacted for 2 hours to obtain a molecular weight of 0.2×10 4 g / mol of three-branched polybutyrolactam.

[0058] (2) Mixing of two kinds of structure polybutyrolactam: high molecular weight linear polybutyrolactam and low molecular weight branche...

Embodiment 2

[0063] 1. The modification method of polybutyrolactam thermal performance comprises the following steps:

[0064] (1) Preparation of raw materials: Synthesis of high molecular weight linear polybutyrolactam: at 90°C, 50g of butyrolactam was reacted with 2.64g of potassium tert-butoxide for 2 hours, and when the temperature was lowered to 40°C, 1.34ml of benzoyl chloride was added As an initiator, react for 24h to obtain a molecular weight of 4.0×10 4 g / mol linear polybutyrolactam; synthesis of low molecular weight branched polybutyrolactam: at 90°C, 50g butyrolactam was reacted with 4.6g potassium tert-butoxide for 2h, and when the temperature was lowered to 40°C, 1.05 ml1,3,5-benzenetricarboxylic acid chloride was used as the initiator, and the reaction was carried out for 6 hours to obtain a molecular weight of 0.6×10 4 g / mol of three-branched polybutyrolactam.

[0065] (2) Mixing of two kinds of structure polybutyrolactam: high molecular weight linear polybutyrolactam and...

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Abstract

The invention relates to a preparation method of modified polybutyrolactam, comprising the following steps: dissolving high-molecular-weight linear polybutyrolactam and low-molecular-weight branched polybutyrolactam in a solvent to obtain a blend; Mixing with a precipitation solvent for precipitation, filtering, washing and drying the obtained precipitate to obtain the modified polybutyrolactam. Compared with the prior art, the raw materials in the present invention can be derived from bio-based substances, which are degradable and green and reproducible; the method of the present invention has no other additives, high purity, low energy consumption, and simple preparation process; The product can effectively reduce the melting point, thereby reducing the difficulty of industrial processing, and the tensile strength is improved, and has wider production and application prospects.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of modified polybutyrolactam; it relates to a polymer material after blending for characterization, performance improvement and processing difficulty reduction, which is applied to the fields of degradable plastics, food packaging and the like. Background technique [0002] In the current situation where global environmental protection issues are becoming increasingly prominent and the demand for a low-carbon economy is increasingly strong, the development of a low-carbon economy has become the fundamental way for the economic development of various countries. Therefore, bio-based materials based on renewable resources have become a new trend in the new situation trend. [0003] Bio-based materials refer to the use of renewable raw materials, such as crops, trees, other plants and their residues and inclusions, etc., to obtain polymer materials or monomers through bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02
CPCC08L77/02C08L2205/025C08L2201/06
Inventor 赵黎明陈靓王乐军陈涛
Owner EAST CHINA UNIV OF SCI & TECH
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