Starch-based elastomer as well as preparation method and application thereof

An elastomer and starch-based technology, applied in the field of starch-based elastomers and their preparation, can solve the problems of difficult industrial production, poor mechanical properties of materials, and limited application range, and achieve rapid preparation, good mechanical properties, Realize the effect of mass production

Pending Publication Date: 2022-03-25
ADVANCED THERMOPLASTIC POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of them is aliphatic polyester materials, but these materials have poor mechanical properties and a narrow processing window due to their high crystallinity and secondary crystallization caused by their high stereoregularity; on the other hand, aliphatic The price of polyester is several times that of ordinary polymer materials, and it is difficult to realize industrial production before its large-scale price reduction
There is also a class of thermoplastic materials based on natural polysaccharide macromolecules such as starch. For example, starch-based plastics plasticized with glycerin, ethylene glycol, and sorbitol can be degraded, but the mechanical properties of the material are poor. , the scope of application is limited

Method used

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  • Starch-based elastomer as well as preparation method and application thereof

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preparation example Construction

[0065] The preparation method of modified starch in the embodiment of the present invention is as follows:

[0066] First, mix 2 parts by weight of starch and 100 parts by weight of water at 90°C, then add 5 parts by weight of iron acetate, and react at room temperature (about 25°C) for 2 hours to obtain modified starch.

Embodiment 1

[0067] Embodiment 1 of the present invention is: starch-based elastomer and preparation method thereof:

[0068] Starch-based elastomers include the following raw materials: 40 parts of polypropylene carbonate polyol (JLB-B2350, Jiangsu Jinlong); 10 parts of polycaprolactone diol (BASF PCL1000); 10 parts of modified starch; 20 parts of straw; (nano-titanium dioxide) 1 part; Catalyst (stannous octoate) 0.5 part; Antioxidant (BASF, antioxidant 1010, CAS number: 6683-19-8) 3 parts; Chain extender (isophorone diisocyanate, worship Er, CAS number: 4098-71-9) 5 parts and plasticizer (glycerin) 1 part.

[0069] The preparation method of above-mentioned starch-based elastomer, comprises the following steps:

[0070] S1. Put the modified starch and straw into a high-speed mixer at a speed of 300rpm / min, and stir for 10 minutes, so that the modified starch and straw are evenly mixed to form a premix;

[0071] S2. Add the premix, filler, catalyst, antioxidant, chain extender and plasti...

Embodiment 2

[0073] Embodiment 2 of the present invention is: starch-based elastomer and preparation method thereof:

[0074] Starch-based elastomers include the following raw materials: 50 parts of polypropylene carbonate polyol (JLB-H2200, Jiangsu Jinlong); 25 parts of polycaprolactone diol (BASF PCL1000); 25 parts of modified starch; 40 parts of straw; (carboxylated nano-titanium dioxide) 5 parts; catalyst (stannous octoate) 1 part; antioxidant (BASF Tinuvin B75ED) 5 parts; chain extender (BASF T-80) 10 parts and plasticizer (urea) 3 parts.

[0075] The preparation method of above-mentioned starch-based elastomer, comprises the following steps:

[0076] S1. Put the modified starch and straw into a high-speed mixer at a speed of 300rpm / min, and stir for 5-10 minutes, so that the modified starch and straw are evenly mixed to form a premix;

[0077] S2. Add the premix, filler, catalyst, antioxidant, chain extender and plasticizer prepared in step S1 into the high-speed mixer in turn, and ...

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Abstract

The invention discloses a starch-based elastomer as well as a preparation method and application thereof. The starch-based elastomer is prepared from the following raw materials: polypropylene carbonate polyol, polycaprolactone glycol, modified starch, straw, filler and an auxiliary agent, wherein the modified starch is iron ion modified starch. According to the invention, ferric ions and starch form a complex, and a coordination cluster formed by a coordination reaction has a physical cross-linking effect, can limit the movement of a starch molecular chain, improve the shear viscosity of a melt, play an anti-plasticizing effect and prolong the extrusion retention time of the melt, so that the shear degradation effect of a screw is improved to a certain extent, and the mechanical property of the screw is improved. The strength and the thermal stability of the starch are improved. The elastomer prepared from the modified starch has good mechanical properties and degradability.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a starch-based elastomer and its preparation method and application. Background technique [0002] In order to reduce the white pollution caused by polymer products, both at home and abroad are committed to developing a new generation of plastic and elastomer products that have excellent properties and are also degradable. One of them is aliphatic polyester materials, but these materials have poor mechanical properties and a narrow processing window due to their high crystallinity and secondary crystallization caused by their high stereoregularity; on the other hand, aliphatic The price of polyester is several times that of ordinary polymer materials, and it is difficult to realize industrial production before its large-scale price reduction. There is also a class of thermoplastic materials based on natural polysaccharide macromolecules such as starch. For example, sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/42C08G18/44C08G18/64C08K3/22C08K9/04C08K9/06
CPCC08G18/44C08G18/4277C08G18/6484C08G18/4081C08K9/04C08K3/22C08K9/06C08K2003/2241C08K2201/011C08K2003/2296
Inventor 钟荣栋刘悦李同兵
Owner ADVANCED THERMOPLASTIC POLYMER TECH
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