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Degradable thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and elastomer technology, applied in the field of degradable materials, can solve the problems of uneven particle agglomeration and dispersion, easy agglomeration of inorganic nanoparticles, and unsatisfactory interface compatibility, so as to improve mechanical properties and promote two-phase phase. The effect of volume and good resilience

Active Publication Date: 2022-04-05
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when SiO 2 When excessive, it will cause nano-SiO 2 Particle agglomeration and dispersion are uneven, which reduces the mechanical properties (Zhou Zhibin, Journal of Chemical Engineering of Chinese Universities, 2016,30(6):1411-1418)
This shows that inorganic nanoparticles are prone to agglomeration and uneven dispersion, and the unsatisfactory interfacial compatibility with the organic matrix will limit the improvement of PBAT performance.

Method used

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  • Degradable thermoplastic elastomer and preparation method thereof
  • Degradable thermoplastic elastomer and preparation method thereof
  • Degradable thermoplastic elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 50 parts of PBAT pellets, 5 parts of PCL pellets, and 100 parts of dichloromethane into the reaction vessel, stir magnetically at room temperature for 6 hours, then add 1 part of glycidyl etheroxypropyl cyclotetrasiloxane, and 0.1 part of ammonium hydroxide , and continued magnetic stirring at room temperature for 3 h. After the reaction was finished, the dichloromethane solvent was removed by rotary evaporation under negative pressure conditions, washed 3 times with absolute ethanol, and dried at low temperature to obtain the product glycidyl etheroxypropyl cyclotetrasiloxane-g-PBAT / PCL (reactant and The molecular structure of the product is as figure 1 shown).

Embodiment 2

[0037] Add 50 parts of PBAT pellets, 5 parts of PCL pellets, and 100 parts of dichloromethane into the reaction vessel, stir magnetically at room temperature for 6 hours, then add 1 part of epoxycyclohexylethyl clathrate polysilsesquioxane, and hydrate 0.1 part of ammonium, and continued magnetic stirring at room temperature for 4 h. After the reaction was finished, the dichloromethane solvent was removed by rotary evaporation under negative pressure conditions, washed 3 times with absolute ethanol, and dried at low temperature to obtain the product epoxycyclohexylethyl clathrate polysilsesquioxane-g-PBAT / PCL ( The molecular structures of the reactants and products are figure 2 shown).

Embodiment 3

[0039] Add 50 parts of PBAT pellets, 5 parts of PCL pellets, and 100 parts of dichloromethane into the reaction vessel, stir magnetically for 6 hours at room temperature, and then add 1 part of trapezoidal polysilsesquioxane whose side group is glycidyl etheroxypropyl , 0.1 part of ammonium hydroxide, and continued magnetic stirring at room temperature for 5 h. After the reaction was finished, the dichloromethane solvent was removed by rotary evaporation under negative pressure conditions, washed with absolute ethanol 3 times, and dried at low temperature to obtain the product trapezoidal polysilsesquioxane-g-PBAT / PCL (molecular structure formula of reactant and product like image 3 shown).

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Abstract

The invention relates to a degradable thermoplastic elastomer and a preparation method thereof. The elastomer comprises a copolymer (PBAT) of butylene adipate and butylene terephthalate, polycaprolactone (PCL), multi-arm polysilsesquioxane grafted PBAT / PCL (POSS-g-PBAT / PCL) and a coupling agent. The mass fraction of the POSS-g-PBAT / PCL in the elastomer is 1%-10%, and the mechanical property and the degradation property of the elastomer are regulated and controlled by regulating and controlling the content of the POSS-g-PBAT / PCL. The degradable thermoplastic elastomer prepared by the invention has high strength, high toughness and better rebound resilience and degradability.

Description

technical field [0001] The invention relates to a degradable thermoplastic elastomer and a preparation method thereof, belonging to the field of degradable materials. Background technique [0002] At present, many supplies in hotels and hotels are non-degradable plastic products, such as toothbrushes, combs, shower caps, etc. Combs and toothbrush handles are usually made of non-degradable polystyrene (PS) or polypropylene (PP) through injection molding. Toothbrush filament materials are usually obtained from non-degradable polyamide (PA) through fiber forming and rounding (tip) processing. The degradable material polylactic acid (PLA) that has been mass-produced at present has problems such as high hardness, high brittleness, poor fluidity and stretchability. However, there are no reports on the research and application of degradable brush filaments. Simply reduce the spinning speed, at a lower drawing speed, because the PLA molecular chains cannot form highly oriented cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L83/10C08K5/5419C08G77/445
CPCY02W90/10
Inventor 蔡洪杭祖圣韩冰祁云王倡春张春祥
Owner NANJING INST OF TECH