阅读说明：本技术 一种提取小分子量或特定单体比例聚合物的方法 (Method for extracting polymer with small molecular weight or specific monomer ratio ) 是由 束晓文 于 2020-04-30 设计创作，主要内容包括：本发明要求保护一种提取小分子量或特定单体比例聚合物的方法,其通过如下方法得到：根据所需提取的聚合物特性,配制所需极性或溶解特性的溶剂用于溶解聚合物,将一定量的聚合物溶解于配制的溶剂中,相对小分子量或单体比例相对可溶的聚合物将溶解于该溶剂,其余大分子量的聚合物或单体比例不可溶的聚合物将无法溶解,过滤并收集溶液,蒸发干燥得到可溶的聚合物。本发明提取小分子量或特定单体比例聚合物的方法具有如下优点：可根据所需提取的聚合物特性不同,配制不同的溶剂用于提取。具有广泛的适用性。(The invention claims a method for extracting a polymer with small molecular weight or specific monomer ratio, which is obtained by the following method: according to the characteristics of the polymer to be extracted, preparing a solvent with required polarity or dissolution characteristics for dissolving the polymer, dissolving a certain amount of the polymer in the prepared solvent, dissolving the polymer with relatively low molecular weight or monomer ratio and relatively soluble in the solvent, and not dissolving the rest polymer with large molecular weight or monomer ratio and insoluble in the solvent, filtering and collecting the solution, evaporating and drying to obtain the soluble polymer. The method for extracting the polymer with small molecular weight or specific monomer ratio has the following advantages: different solvents can be prepared for extraction according to the characteristics of the polymer to be extracted. Has wide applicability.)

1. A method for extracting polymer with small molecular weight or specific monomer ratio comprises the following steps:

(1) finding the solvent needed to dissolve the polymer of the desired molecular weight or specific monomer ratio,

(2) dissolving the polymer in the solvent, and filtering to remove the polymer with insoluble large molecular weight or not in accordance with the monomer ratio;

(3) the collected filtrate is dried to remove the solvent, and the desired polymer is obtained.

2. The method according to claim 1, wherein in step (1), solvents with different polarity or characteristics are mixed to obtain a solvent capable of dissolving the desired small molecule or polymer with a specific monomer ratio.

3. The method as claimed in claim, wherein in the step (1), the solvents with different characteristics are selected and mixed according to the polymer to be extracted, so as to obtain the solvent with the required dissolution characteristics.

4. The method of claim 1, wherein the target polymer is dissolved in a solvent and then filtered to remove insoluble high molecular weight or monomer ratio mismatched polymers.

Technical Field

The invention relates to the technical field of high molecular chemistry, in particular to a method for extracting a polymer with small molecular weight or specific monomer proportion.

Background

In the process of synthesizing high molecular copolymer, the combination of two monomers is involved, and the molecular weight and the dispersion coefficient determine the characteristics and the performance of the polymer, therefore, the polymer with specific molecular weight and monomer ratio needs to be screened out. The purpose of this process is to extract polymers of small molecular weight or specific monomer proportions.

Disclosure of Invention

The invention aims to provide a method for extracting a polymer with small molecular weight or specific monomer ratio.

The purpose of the invention is realized by the following technical scheme: a method for extracting a polymer with small molecular weight or specific monomer ratio is realized by the following steps:

(1) knowing the solubility of the polymer to be extracted,

(2) selecting different solvents to prepare suitable solvents for dissolving according to the solubility of the target polymer;

(3) dissolving the unextracted polymer in the prepared solvent, and filtering to remove insoluble substances;

(4) the collected solution was dried to remove the solvent, to obtain an extracted polymer.

In a preferred technical scheme of the invention, in the step (2), solvents with different dissolution characteristics are mixed to obtain the extraction solvent.

In a preferred embodiment of the present invention, the insoluble portion of the polymer is removed by filtration.

In the preferred technical scheme of the invention, the collected filtrate is dried and the solvent is removed to obtain the needed polymer.

The method for extracting the polymer with small molecular weight or specific monomer ratio has the following advantages:

the method can be used for preparing solvents with different solubilities according to the specific conditions of different polymers to extract the needed target polymer.

Drawings

FIG. 1 is a flow diagram of an example of the extraction of a polymer of small molecular weight or specific monomer ratio.

Detailed Description

For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with specific examples, but it is to be understood that these descriptions are merely provided to further illustrate features and advantages of the invention, and are not intended to limit the scope of the claims.

The above-described scheme is further illustrated below with reference to specific examples. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.