Biologic degradable copolyester and preparation process thereof

A copolyester and biological technology, applied in the field of biodegradable copolyester and its preparation, can solve the problems of melting point and tensile strength decrease, achieve the effect of improving molecular weight and various properties, shortening the processing process and time

Active Publication Date: 2006-11-15
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the elongation at break and biodegradability are significantly improved, the melting point and tensile strength are all decreased (Sun Jie, Zhang Dalun, Tan Huimin, et al. China Plastics, 2004, 18(1): 43-45)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] What this embodiment prepared was poly(butylene succinate-co-butylene adipate) copolyester (PBSA)

[0024] Weigh 0.40 moles of succinic acid and 0.10 moles of adipic acid, and 0.505 moles of 1,4-butanediol respectively, and add them into the reactor. Connect the distillation column to the water container; then heat and stir slowly at the same time. After the temperature exceeds 160°C and the monomer is completely melted, quickly increase the stirring speed and continue heating to 200°C. At this time, keep the constant temperature reaction for 10 minutes; When the temperature reaches 220°C, each temperature range is kept at constant temperature for 10 minutes; finally, the temperature control range is set at 220°C to 230°C, and the reaction is carried out for 90 minutes until no more liquid distills out. During the process, due to the continuous increase of the viscosity of the system, it is necessary to ensure the strong stirring of the system. The end point of this st...

Embodiment 2

[0028] What this embodiment prepared was poly(butylene succinate-co-butylene succinate) copolyester (PBSM)

[0029] Weigh 0.45 moles of succinic acid, 0.05 moles of methylsuccinic acid, and 0.55 moles of 1,4-butanediol, and add them to the reactor, one of which is filled with sufficient nitrogen protection, one is stirred, and the other is divided The water separator and the water separator are connected with a Vickers distillation column and coated with vacuum silicon ester to lubricate and seal; then heat and stir slowly at the same time. When the temperature exceeds 160°C, the monomer is completely melted, quickly increase the stirring speed and continue to heat to 190°C At this time, keep the constant temperature reaction for 10 minutes; then, use the temperature program to reach 220 ° C, and keep the constant temperature reaction for 10 minutes in each temperature range; finally, set the temperature control range at 220 ° C ~ 230 ° C, and react for 90 minutes until there i...

Embodiment 3

[0033] What this embodiment prepared was poly(butylene succinate-co-2,2-dimethyl butylene succinate) copolyester (PBS2M)

[0034] Weigh 0.30 moles of succinic acid, 0.20 moles of 2,2-dimethylsuccinic acid, and 0.575 moles of 1,4-butanediol, and add them to the reactor, one of which is filled with sufficient nitrogen protection, and the other is stirred , the other port is connected to the water separator and the distillation column of the water separator; then heat and stir slowly at the same time. After the temperature exceeds 160°C and the monomer is completely melted, quickly increase the stirring speed and continue heating to 195°C. At this time, keep the constant temperature for 10 minutes. ; Subsequently, the temperature was programmed to reach 220°C, and the reaction was performed at a constant temperature for 10 minutes in each temperature range; finally, the temperature control range was set at 220°C to 230°C, and the reaction was carried out for 90 minutes until no mo...

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Abstract

A biodegradable copolyester (butanediester polysuccinate for example) is prepared from butanedioic acid, butanediol, copolydiol and copolydiacid through copolymerizing to obtain atactic linear copolyester, and condensation.

Description

technical field [0001] A biodegradable copolyester and its preparation method relate to a series of biodegradable polybutylene succinate-based copolyesters and its preparation method, belonging to biodegradable multi-component copolyester products and Preparation method technical field. Background technique [0002] Polybutylene succinate (PBS) has a high melting point, good mechanical properties and good biodegradability, and it can be finally converted into carbon dioxide and water under the action of bacteria or enzymes. As early as the 1990s, Japan’s Showahighpolymer Company first used succinic acid and butanediol as raw materials, added adipic acid as a copolymerization component, and developed biodegradable polyester Bionolle, which was mainly used to produce packaging bottles, films, etc. . Currently, research on PBS has become a hot spot in the field of biodegradable plastics. Due to its molecular structure, it is flexible and has excellent processing performance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/78
Inventor 郭宝华徐军徐永祥马世金曹祝兴
Owner TSINGHUA UNIV
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