Bio-based biodegradable multi-block copolymer as well as preparation method and application thereof

A multi-block copolymer and biodegradable technology, which is applied in the field of bio-based biodegradable multi-block copolymers, can solve the problems of destroying the earth's ecological environment, inability to use flexible packaging materials, and inability to degrade, etc., to achieve excellent comprehensive mechanical properties, Guaranteed biodegradability, good effect of biodegradability

CN108192105AInactive Publication Date: 2018-06-22王肖桦
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-06-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses bio-based biodegradable multi-block copolymer as well as a preparation method and application thereof. The multi-block copolymer comprises a chain segment A and a chain segmentB; the chain segment A is fat-aromatic coplyester with number average molecular weight of 3000 to 100000, which is obtained by performing esterification (ester exchange) on C2-C36 fatty diacid and derivatives thereof, C6-C20 aromatic diacid and derivatives thereof, C2-C36 divalent alcohol, and 0.0 to 10% by weight of polyhydroxyl or polycarboxyl compound and performing condensation polymerization; the chain segment B is fatty copolyester with number average molecular weight of 3000 to 100000, which is obtained by performing esterification (ester exchange) on dimer acid and derivatives thereof, C2-C12 fatty diacid and derivatives thereof, C2-C36 divalent alcohol as well as 0.0 to 10% of polyhydroxyl or polycarboxyl compound and performing condensation polymerization. The chain segment A and the chain segment B react with a polyfunctional chain extender of polyisocyanate, a polyepoxy compound and carbodiimide which is 0.01 to 10% of the polymer to form the multi-block copolymer. The product prepared by the method has high biodegradability, mechanical property and processing property, and can be widely applied to the fields of packaging, biological medicine, medical treatment and thelike.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a bio-based biodegradable multi-block copolymer and its production method and application. Background technique

[0002] Since the 20th century, humans have synthesized a variety of polymer synthetic materials, such as polyethylene, polypropylene, polyvinyl chloride, ABS, polystyrene, polyester, etc. The appearance of these materials has greatly facilitated people's lives , but also because these materials cannot be degraded in the environment for a long time after they are discarded, which brings about the problem of "white pollution" and destroys the ecological environment of the earth. In addition, these materials are derived from fossil resources such as petroleum, coal, and natural gas, and these fossil resources are non-renewable.

[0003] In order to solve the environmental pollution and resource regeneration problems caused by plastic products, mate...

Examples

Embodiment 1

[0041] step one:

[0042] Weigh 5.15 kg of bio-based succinic acid, 5.57 kg of 2,5-furandicarboxylic acid, 18 kg of petroleum-based 1,4-butanediol, 30 grams of bio-based glycerin, 32 grams of tetrabutyl titanate, add to 50 liters In the esterification reaction kettle, the temperature was raised to 200-250° C. by means of a temperature program, and the reaction was stirred for 2-5 hours until the esterification rate reached more than 97%, and the esterified product A was obtained.

[0043] Transfer the esterified product A to a 50-liter polycondensation kettle with a decompression device, vacuumize it to an absolute pressure of 3-5Kpa while stirring, and raise the temperature to 200-250°C at the same time, stir and react for 1-2 hours, and further reduce the pressure to an absolute pressure 100-200Pa, continue to react for 1-3 hours. The end point of the reaction is judged according to the change of the stirring current, and the segment A aliphatic-aromatic copolyester prepoly...

Embodiment 2

[0050] step one:

[0051] Weigh 5.56 kg of bio-based succinic acid, 5.2 kg of petroleum-based terephthalic acid, 17.0 kg of petroleum-based 1,4-butanediol, 1500 grams of lactic acid, and 10 grams of ethylene glycol antimony, and add them to a 50-liter esterification reaction kettle In the process, the temperature was raised to 210-230° C. by means of temperature programming, and the reaction was stirred for 3-5 hours until the esterification rate reached more than 97%, and the esterified product A was obtained.

[0052] Transfer the esterified product A to a 50-liter polycondensation kettle with a decompression device, vacuumize it to an absolute pressure of 3-5Kpa while stirring, and raise the temperature to 230°C at the same time, stir and react for 2-3 hours, and further reduce the pressure to an absolute pressure of 100-5Kpa 200Pa, continue to react for 2 to 5 hours. The end point of the reaction is judged according to the change of the stirring current, and the segment A...

Embodiment 3

[0059] step one:

[0060] Weigh 4.80 kg of bio-based adipic acid, 1.85 kg of dimer acid, 4.85 kg of terephthalic acid, 14.5 kg of petroleum-based 1,4-butanediol, 300 grams of glycerin, and 30 grams of tetrabutyl titanate, add to 50 In the esterification reaction kettle, the temperature was raised to 230° C. by means of a temperature program, and the reaction was stirred for 2 to 5 hours until the esterification rate reached more than 97%, and the esterified product A was obtained.

[0061] Transfer the esterified product A to a 50-liter polycondensation kettle with a decompression device, vacuumize it to an absolute pressure of 3-5Kpa while stirring, and raise the temperature to 230°C at the same time, stir and react for 1-2 hours, and further reduce the pressure to an absolute pressure of 100-5Kpa 200Pa, continue to react for 2 to 5 hours. The end point of the reaction is judged according to the change of the stirring current, and the segment A aliphatic-aromatic copolyester...