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Preparation method of poly (butylene succinate) (PBS) used as spinning dope

A technology of polybutylene succinate and spinning dope is applied in the preparation of polybutylene succinate polymer and the preparation field of polybutylene succinate, and can solve the problem of excessive molecular weight distribution , polymerization degree difference, uneven distribution and other problems, to achieve the effect of low linear density uneven rate, small linear density deviation, and low molecular weight distribution

Inactive Publication Date: 2015-06-10
WUXI BAOFENG PETROCHEM EQUIP
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Problems solved by technology

[0007] The reason is that the molecular weight distribution is actually an index of the distribution width of molecules with different degrees of polymerization. The higher the index, the worse the uniformity in the reaction process; The uneven distribution, or local unevenness, causes obvious differences in the degree of polymerization in the system, resulting in an excessively wide molecular weight distribution.

Method used

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  • Preparation method of poly (butylene succinate) (PBS) used as spinning dope

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Embodiment 1

[0034] The PBS stock solution used for spinning was prepared using the polymerization form of the continuous quaternary reaction. The addition amount of succinic acid is 10kg / h.

[0035] A method for preparing polybutylene succinate used as a spinning stock solution, using succinic acid and butanediol with a mass ratio of 1:0.8~1.2 to realize PBS bulk polymerization through a four-stage reaction, and prepare it for spinning Stock solution of polybutylene succinate;

[0036] Specific steps are as follows:

[0037] (1) First-stage reaction: Add the succinic acid to be reacted into the electrically heated material melter 1 at a flow rate of 10kg / h, heat it to 180°C, and transport it to the first dynamic mixer 3 through the first conveying device 2 , add 4.74kg / h of butanediol during the conveying process, fully mix in the first dynamic mixer 3; continue to convey to the first-stage main reactor 4, control the reaction temperature to 180°C, and the reaction pressure to 0.4MPa ,...

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Abstract

The invention relates to a preparation method of poly (butylene succinate) (PBS) used as spinning dope, belonging to the technical field of polymer preparation. The PBS used as the spinning dope is prepared by carrying out fourth-order reaction on succinic acid and butanediol to realize PBS mass polymerization, wherein the mass ratio of the succinic acid to the butanediol is 1: (0.8-1.2). The PBS used as the spinning dope is low in molecular weight distribution; after the spinning dope is spun, an elastomer or material used in the non-fiber field can be obtained; the PBS used as the spinning dope is smaller in deviation of liner density, low in uneven rate of liner density, high in breaking strength and low in uneven rate of breaking strength.

Description

technical field [0001] The present invention relates to a kind of preparation method of polybutylene succinate used as spinning stock solution, especially for the preparation of polybutylene succinate polymer that can be used as spinning stock solution, wherein the polymer is The invention is prepared by using succinic acid and butanediol as monomers, and belongs to the technical field of polymer preparation. Background technique [0002] Polybutylene succinate (PBS) is currently a very popular biodegradable material in the world. It can replace many of the original polymer materials that have been used but have very poor biodegradability, such as polypropylene, polypropylene Vinyl, polyethylene terephthalate, etc. [0003] Many patents and documents published at present have made many detailed descriptions of its synthesis methods, and tested various physical properties of its synthetic polymers. The results show that PBS can completely replace polypropylene or polyethylen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/78D01F6/62
Inventor 吕涛许洪军
Owner WUXI BAOFENG PETROCHEM EQUIP
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