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Elastomer short fiber toughened crystalline polymer product and preparation method thereof

A crystalline polymer, short fiber technology, applied in the direction of conjugated synthetic polymer rayon, additive processing, etc., can solve the problem of polylactic acid impact strength and tensile strength decrease

Active Publication Date: 2019-07-26
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in impact strength of PLA is accompanied by a substantial decrease in tensile strength

Method used

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  • Elastomer short fiber toughened crystalline polymer product and preparation method thereof
  • Elastomer short fiber toughened crystalline polymer product and preparation method thereof
  • Elastomer short fiber toughened crystalline polymer product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take the elastomeric polyurethane resin and put it into a vacuum oven at 80° C. to dry for 4 hours to obtain the dried elastomeric polyurethane resin for future use.

[0037] (2) Take the crystalline polylactic acid resin and put it into a vacuum oven at 80° C. to dry for 8 hours to obtain a dried crystalline polylactic acid resin for future use.

[0038] (3) raw materials are weighed according to the following mass percentages: 10% of the dried elastomer polyurethane resin obtained in step (1), 90% of the dried crystalline polylactic acid resin obtained in step (2), the mass percentages of the two raw materials The sum is 100%.

[0039] (4) Mix the raw materials weighed in step (3) and perform melt blending and granulation with twin-screws to obtain composite pellets with a diameter of 1.3 to 2.5 mm and a length of 5 to 7 mm, and vacuum-dry at 80°C for 12 hours Standby, during the extrusion process, the twin-screw speed is controlled at 160-180r / min, and the blend...

Embodiment 2

[0043] (1) Take the elastomeric polyurethane resin and put it into a vacuum oven at 80° C. to dry for 4 hours to obtain the dried elastomeric polyurethane resin for future use.

[0044] (2) Take the crystalline polylactic acid resin and put it into a vacuum oven at 80° C. to dry for 8 hours to obtain a dried crystalline polylactic acid resin for future use.

[0045] (3) raw materials are weighed according to the following mass percentages: 20% of the dried elastomer polyurethane resin obtained in step (1), 80% of the dried crystalline polylactic acid resin obtained in step (2), the mass percentages of the two raw materials The sum is 100%.

[0046] (4) Mix the raw materials weighed in step (3) and perform melt blending and granulation with twin-screws to obtain composite pellets with a diameter of 1.3 to 2.5 mm and a length of 5 to 7 mm, and vacuum-dry at 80°C for 12 hours Standby, during the extrusion process, the twin-screw speed is controlled at 160-180r / min, and the blend...

Embodiment 3

[0050] (1) Take the elastomeric polyurethane resin and put it into a vacuum oven at 80° C. to dry for 4 hours to obtain the dried elastomeric polyurethane resin for future use.

[0051] (2) Take the crystalline polylactic acid resin and put it into a vacuum oven at 80° C. to dry for 8 hours to obtain a dried crystalline polylactic acid resin for future use.

[0052] (3) raw materials are weighed according to the following mass percentages: 30% of the dried elastomer polyurethane resin obtained in step (1), 70% of the dried crystalline polylactic acid resin obtained in step (2), the mass percentages of the two raw materials The sum is 100%.

[0053] (4) Mix the raw materials weighed in step (3) and perform melt blending and granulation with twin-screws to obtain composite pellets with a diameter of 1.3 to 2.5 mm and a length of 5 to 7 mm, and vacuum-dry at 80°C for 12 hours Standby, during the extrusion process, the twin-screw speed is controlled at 160-180r / min, and the blend...

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Abstract

The invention discloses an elastomer short fiber toughened crystalline polymer product and a preparation method thereof. The preparation method includes: mixing thermoplastic elastomers and a crystalline resin raw material according to the mass percentage ratio of (10-30%):(70-90%), using a double-screw extruder to perform melt blending granulation, and drying to obtain blended granules, wherein the difference between the melting temperature of the thermoplastic elastomers and the melting temperature of the crystalline resin raw material is 10-20 DEG C; adding the obtained blended granules into a single-screw extruder to perform melt extrusion, and the extruded material is subjected to primary stretching and three-stage water tank cooling treatment to obtain 3D printing wires; placing the3D printing wires in a fused deposition modeling 3D printer, subjecting the melt to secondary stretching and tertiary stretching during printing, stacking on a forming platform to form a three-dimensional structure, and cooling to obtain the elastomer short fiber toughened crystalline polymer product. The preparation method is simple in equipment, easy in processing process control, capable of forming complex geometrical structures and the like.

Description

technical field [0001] The invention relates to the technical field of polymer 3D printing consumables, in particular to an elastomer short fiber toughened crystalline polymer product and a preparation method thereof. Background technique [0002] Microfiber composites (Micro Fibrillar Composites, MFCs) is a composite material favored by researchers. This concept was proposed by scientists Evstatiev and Fakirov in 1992. It can effectively improve the compatibility and mechanical properties of the immiscible blend system. Compared with conventional polymer blends and composites, MFCs have potential advantages such as light weight, easy processing, and recyclability. The preparation of MFCs is mainly divided into three steps: first, melt blending, second, stretching by single-screw or twin-screw extrusion, and finally, post-processing by molding or injection molding. [0003] Depending on the length of the fibers, fiber reinforced composites can be classified as continuous o...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L75/04D01F8/14D01F8/16B33Y70/00
CPCB33Y70/00C08L67/04D01F8/14D01F8/16C08L75/04
Inventor 郭建军王建业张一帆李志祥孙爱华刘丰华许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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