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Biodegradable PBST polymer, preparation method and application thereof, agricultural mulching film and preparation method

A biodegradable and agricultural mulching technology, applied in the field of polymer preparation, can solve the problems of poor moisture retention, slow crystallization speed and high production cost of PBST

Pending Publication Date: 2021-08-20
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PBST has crystallinity, but its crystallization speed is relatively slow, and its crystal structure is not perfect. The difference of its crystallinity, crystal form and well structure has a great influence on the performance of PBST
But, in the prior art, the production cost of PBST is higher, and the PBST moisture retention of making is poorer

Method used

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  • Biodegradable PBST polymer, preparation method and application thereof, agricultural mulching film and preparation method
  • Biodegradable PBST polymer, preparation method and application thereof, agricultural mulching film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In the 8t-10t per day small flexible modified polyester continuous polyester polycondensation production plant, the molar ratio of terephthalic acid and succinic acid is 1:1.32 and butanediol is 1:1.19 by molar ratio, and the catalyst is tetratitanate isopropyl ester. Its addition amount is 0.05% of PTA material quantity. Beat for 40 minutes, put it into the slurry supply tank for internal circulation for standby.

[0060] The obtained slurry is pumped from the supply tank into the first ester reaction kettle by a metering pump, and the esterification reaction is carried out. The esterification temperature is controlled at 170°C, and the flow rate is controlled at 200kg / h, so that the liquid level is maintained at 1000mm, and the esterification rate reaches 52%. . The esterified product is pumped into the second esterification reaction production tank from the material to carry out the esterification reaction. The temperature of the reactant is 215°C, and the flow rat...

Embodiment 2

[0067] On a small-scale flexible modified polyester continuous polyester polycondensation production plant with a daily output of 8t-10t, the molar ratio of terephthalic acid to succinic acid is 1:1.42 and butanediol is used at a molar ratio of 1:1.19, and the catalyst is tetratitanate isopropyl ester. Its addition amount is 0.05% of PTA material quantity. Beat for 40 minutes, put it into the slurry supply tank for internal circulation for standby.

[0068] The obtained slurry is pumped from the supply tank into the first ester reaction kettle by a metering pump, and the esterification reaction is carried out. The esterification temperature is controlled at 170°C, and the flow rate is controlled at 200kg / h, so that the liquid level is maintained at 1000mm, and the esterification rate reaches 52%. . The esterified product is pumped into the second esterification reaction production tank from the material to carry out the esterification reaction. The temperature of the reactan...

Embodiment 3

[0075] In the continuous polyester polycondensation production plant of 8t-10t small-scale flexible modified polyester, the molar ratio of terephthalic acid and succinic acid is 1:1.22 and butanediol, the molar ratio is 1:1.19, and the catalyst is tetratitanate isopropyl ester. Its addition amount is 0.05% of PTA material quantity. Beat for 40 minutes, put it into the slurry supply tank for internal circulation for standby.

[0076] The obtained slurry is pumped from the supply tank into the first ester reaction kettle by a metering pump, and the esterification reaction is carried out. The esterification temperature is controlled at 170°C, and the flow rate is controlled at 200kg / h, so that the liquid level is maintained at 1000mm, and the esterification rate reaches 52%. . The esterified product is pumped into the second esterification reaction production tank from the material to carry out the esterification reaction. The temperature of the reactant is 215°C, and the flow ...

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Abstract

The invention discloses a biodegradable PBST polymer, a preparation method and application thereof, an agricultural mulching film and a preparation method, which belong to the technical field of polymer preparation. The method comprises the following steps of preparing a first mixture from terephthalic acid and succinic acid, preparing a second mixture from the first mixture and butanediol, adding a catalyst into the second mixture to obtain a material to be beaten, preparing functional powder slurry, enabling a material to be beaten to be sequentially subjected to beating, first-step esterification and second-step esterification to obtain a first intermediate product, and fully mixing the first intermediate product and the functional powder slurry, and sequentially carrying out pre-polycondensation, final polycondensation, extrusion, pelletizing and drying to obtain the biodegradable PBST polymer. The polymer is prepared by a preparation method of the polymer. The polymer can be used for an agricultural mulching film, and the agricultural mulching film is obtained by blowing the PBST polymer under a characteristic melting point condition. The mulching film almost has no influence on soil, can achieve a better mulching film effect, and is low in cost.

Description

technical field [0001] The invention relates to the technical field of polymer preparation, in particular to a biodegradable PBST polymer, its preparation method, application, agricultural mulching film and preparation method. Background technique [0002] Poly(butylene succinate-co-terephthalate), PBST is a good biodegradable material, which is of great significance in theoretical research and practical application . For high molecular polymers, their crystallization properties and thermodynamic properties have an important impact on practical applications. PBST has crystallinity, but its crystallization speed is relatively slow, and its crystal structure is not perfect. The difference of its crystallinity, crystal form and well body structure has a great influence on the performance of PBST. However, in the prior art, the production cost of PBST is relatively high, and the prepared PBST has poor moisture retention. Contents of the invention [0003] In view of this, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78C08L67/02C08L71/02C08K3/34C08K3/30C08J5/18A01G13/02
CPCC08G63/183C08G63/78C08J5/18A01G13/0275C08J2367/02C08J2471/02C08K2201/011C08K3/346C08K2003/3045Y02A40/28
Inventor 刘伯林武术芳王金花金剑赵晓婷钟淑芳杨宇
Owner CHINESE TEXTILE ACAD