Polyester biodegradation agricultural mulching film as well as preparation and application of polyester biodegradation agricultural mulching film

A biodegradable and agricultural mulching technology, applied in the field of polymers, can solve the problems of high cost, inconvenient large-scale production and processing, large and uneven particle size, etc., and achieve simple production and processing, low comprehensive use cost and excellent mechanical properties Effect

Active Publication Date: 2012-10-03
新疆康润洁环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently developed aromatic polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT) and other such polyesters Strong water resistance, resistant to bacterial erosion, etc., cannot be biodegraded under natural conditions
Aliphatic polyesters such as poly 3-hydroxyalkanoate (PHA), polybutylene succinate (PBS), etc., such aliphatic polyesters are known for their good biocompatibility, biodegradability, etc. Its characteristics are attracting more and more attention, and it is applied in the fields of biomedical materials and injection molding products, but there are also some shortcomings in the process of practical application: such as relatively expensive price, too fast biodegradation rate, poor thermal stability, relatively poor mechanical properties, Easy hydrolysis, easy aging, high impurity content and other shortcomings, which limit the application of this type of polyester material in some fields
[0009] 1. The rate of degradation cycle cannot be adjusted, which leads to the degradation of biodegr...

Method used

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  • Polyester biodegradation agricultural mulching film as well as preparation and application of polyester biodegradation agricultural mulching film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1) With respect to 1.00 mol of terephthalic acid, the slurry mixed with 4.50 mol of 1,4-butanediol, 1.5 mol of adipic acid and 0.05 mol of allyl polyethylene glycol ether was mixed at 70°C It is transported to the raw material storage tank a, and enters the continuous supply esterification reactor b through the raw material output pipe line 1. At the same time, a 0.005 mol solution of tetrabutyl titanate at 75° C. is sent from the pipeline 2 . The internal reaction temperature of reactor b is 230°C and the pressure is 80kPa. Collect the esterification water, by-products and the remaining polymerized monomer mixture in the rectification tower container c through line 3. After keeping the system stable, collect the esterification water , when the esterification rate reaches more than 90%, in the reactor b, continue to transport the 75°C tetrabutyl titanate solution from the pipeline 2 to the reactor b, and reduce the pressure to 5500Pa, and continue the reaction for 3 hou...

Embodiment 2

[0066] 1) For 0.50mol of terephthalic acid, 0.50mol of naphthalic acid, 4.50mol of 1,4-butanediol, 1.0mol of adipic acid, 0.5mol of adipic acid, and 0.10mol of allyl The alcohol-mixed slurry is transported to the raw material storage tank a at 70°C, and enters the continuous supply esterification reactor b through the raw material output pipe line 1. At the same time, a 0.005 mol solution of tetrabutyl titanate at 75° C. is sent from the pipeline 2 . The internal reaction temperature of reactor b is 200°C and the pressure is 70kPa. Collect the esterification water, by-products and the remaining polymerized monomer mixture in the rectification tower container c through line 3, and collect the esterification water after keeping the system stable. , when the esterification rate reaches more than 90%, in reactor b, continue to transport tetrabutyl titanate solution obtained at 75°C from pipeline 2 to reactor b, and depressurize to 4500Pa, and continue to react for 2.5 hours. The ...

Embodiment 3

[0070] 1) Mix 1.00mol of terephthalic acid, 3.50mol of 1,4-butanediol, 1.00mol of neopentyl glycol, 1.5mol of adipic acid, and 0.10mol of glycidyl methacrylate The slurry is transported to the raw material storage tank a at 70° C., and enters the continuous supply esterification reactor b through the raw material output pipe line 1 . At the same time, a 0.010 mol solution of tetrabutyl titanate at 75° C. is sent from the pipeline 2 . The internal reaction temperature of reactor b is 210°C and the pressure is 60kPa. Collect the esterification water, by-products and the remaining polymerized monomer mixture in the rectification tower container c through line 3. After keeping the system stable, collect the esterification water , when the esterification rate reaches more than 90%, in reactor b, continue to transport tetrabutyl titanate solution at 75°C from pipeline 2 to reactor b, and reduce the pressure to 4000Pa, and continue to react for 2.0 hours. The resulting oligomer 3 wa...

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Abstract

The invention discloses a polyester biodegradation agricultural mulching film, which is prepared from A-J ingredients. Meanwhile, the invention discloses a preparation method and an application of the polyester biodegradation agricultural mulching film. The polyester biodegradation agricultural mulching film provided by the invention belongs to the polyester biodegradation agricultural mulching film which is prepared by a preparation method of aromatic dibasic acid introduction and dibasic alcohol copolyester chain extension modification and is used in Sinkiang regions. The polyester biodegradation agricultural mulching film has the advantages that the degradation period is controllable, the performance is excellent, the molecular weight is high, the branching degree is high, the crystallinity degree is high, few impurities are contained, and nontoxicity and biodegradability are realized.

Description

technical field [0001] The invention relates to a polymer, in particular to a polyester biodegradable agricultural mulch film and its preparation and application. Background technique [0002] Xinjiang is located in the hinterland of Eurasia, 34°-49° north latitude, 72°-96° east longitude, accounting for one-sixth of the country's total area. The introduction of plastic film mulching cultivation technology has greatly promoted the sustainable high-yield and stable development of agricultural production in Xinjiang, bringing significant economic benefits. In recent years, due to the shortage of labor resources in Xinjiang and the large-scale promotion and application of cotton pickers, it has become more difficult to recycle the residual film in the field. Due to the use of plastic film year after year, it accumulates in the plowing layer with the plowing of the soil every year. , destroy the soil structure, affect the soil air permeability and the growth and development of ...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L75/06C08G18/42C08G63/183C08G63/189C08G63/685A01G13/02
CPCY02A40/28
Inventor 孔立明陈志伟王新勇孙九胜
Owner 新疆康润洁环保科技股份有限公司
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