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Degradable quick-forming PET/PBS (polyethylene terephthalate/phosphate buffer solution) alloy and preparation method thereof

A technology of alloy and nucleating agent, which is applied in the field of rapid forming PET/PBS alloy and its preparation, and degradable, which can solve the problem of PET’s high strength, high modulus, high thermal deformation, difficulty in taking advantage of two phases, and deterioration of materials Performance and other issues, to achieve the effect of biodegradability, flexibility, and improved crystallization performance

Inactive Publication Date: 2014-12-24
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are benzene rings in the molecular chain of PBT, which has only two more methylene groups than PET in structure, so the contribution to improving the crystallization speed of PET is relatively weak, and it will only have a more obvious effect in alloys with PBT as the main phase, so Unable to take advantage of PET's high strength, high modulus, and high thermal deformation material
CN103709675A discloses a PET / PE blended alloy material and its preparation method. PE is a flexible molecular chain with a glass transition temperature of -78°C. The introduction of PE can improve the segmental mobility of PET. However, PET is a polar material. PE is a non-polar material, and the two are incompatible, so it is actually difficult to take advantage of the two phases, and even deteriorate the performance of the material

Method used

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  • Degradable quick-forming PET/PBS (polyethylene terephthalate/phosphate buffer solution) alloy and preparation method thereof

Examples

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Embodiment 1

[0023] Example 1 Preparation of a degradable and rapid-forming PET / PBS alloy of the present invention (1)

[0024] Composition: 100 parts of PET, 20 parts of PBS, 3 parts of ethylene-acrylic acid sodium salt Aclyn285, 2 parts of EPDM-g-GMA, 15 parts of alkali-free long fiber, 0.5 part of cyclobutylene terephthalate; the PET The intrinsic viscosity of the PBS is 0.70dL / g, and the intrinsic viscosity of the PBS is 1.0 dL / g.

[0025] Preparation process: dry the PET at 110°C for 6 hours, put PET, PBS, ethylene-acrylic acid sodium salt Aclyn285, EPDM-g-GMA, cyclobutylene terephthalate into a high-speed mixer Mixing for 4 minutes; adding the mixed material into the hopper of the twin-screw extruder, adding the alkali-free long fiber from the glass fiber port, extruding through melt blending, drawing, then water cooling, drying, and pelletizing; The rotating speed of the twin-screw extruder is 400r / min, and the temperature of each zone of the twin-screw extruder is controlled at 2...

Embodiment 2

[0026] Example 2 Preparation of a degradable and rapid-forming PET / PBS alloy of the present invention (2)

[0027] Composition: 100 parts of PET, 40 parts of PBS, 5 parts of sodium acetoacetate, 3 parts of POE-g-MAH, 30 parts of alkali-free long fiber, 1 part of cyclobutylene terephthalate; the intrinsic viscosity of the PET It is 0.80dL / g, and the intrinsic viscosity of described PBS is 1.2 dL / g.

[0028] Preparation process: dry the PET at 120°C for 5 hours, put PET, PBS, sodium acetoacetate, POE-g-MAH, and cyclobutylene terephthalate into a high-speed mixer and mix for 4 minutes; Add the mixed material into the hopper of the twin-screw extruder, add the alkali-free long fiber from the glass fiber port, melt and blend, extrude, draw strands, then water-cool, dry, and pelletize; the twin-screw The rotating speed of the extruder is 300r / min, and the temperature of each zone of the twin-screw extruder is controlled at 250°C.

Embodiment 3

[0029] Example 3 Preparation of a degradable and rapid-forming PET / PBS alloy of the present invention (3)

[0030] Composition: 100 parts of PET, 20 parts of PBS, 5 parts of ethylene-acrylic acid sodium salt Aclyn285, 2 parts of POE-g-MAH, 30 parts of alkali-free long fiber, 0.5 part of cyclobutylene terephthalate; the PET The intrinsic viscosity of the PBS is 0.75dL / g, and the intrinsic viscosity of the PBS is 1.1dL / g.

[0031] Preparation process: Dry the PET at 110°C for 5 hours, put PET, PBS, ethylene-acrylic acid sodium salt Aclyn285, POE-g-MAH, and cyclobutylene terephthalate into a high-speed mixer Mixing for 3 minutes; adding the mixed material into the hopper of the twin-screw extruder, adding the alkali-free long fiber from the glass fiber port, extruding through melt blending, drawing, then water cooling, drying, and pelletizing; The rotational speed of the twin-screw extruder is 200r / min, and the temperature of each zone of the twin-screw extruder is controlled ...

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Abstract

The invention provides a degradable quick-forming PET / PBS alloy which is prepared from the following materials in parts by weight: 100 parts of PET, 20-40 parts of PBS, 3-5 parts of nucleating agent, 2-3 parts of toughener, 15-30 parts of glass fiber and 0.5-1 part of processing assistant. The invention also provides a preparation method of the PET / PBS alloy. The PBS is added by an alloying process to improve the crystallinity of the PET and enhance the activity of the PET molecular chain; the obtained alloy has the advantages of favorable mechanical properties and short forming cycle; the PBS is all-biodegradable plastics; the PBS material is extended to the field of engineering plastics by the PET / PBS alloying process, thereby implementing biodegradability of the engineering plastics; and the development of green engineering plastics has important practical meanings for sustainable development.

Description

technical field [0001] The invention relates to a PET / PBS alloy, in particular to a degradable and quick-forming PET / PBS alloy and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a semi-crystalline thermoplastic engineering plastic with excellent mechanical properties, electrical properties, and heat resistance. PET is the variety with the largest output and the lowest price among thermoplastic polyesters, and has broad application prospects. However, due to the high rigidity of the main chain, the movement of the chain segments is slow, the crystallization temperature is high, and the crystallization speed is slow, which leads to long molding cycles. The temperature is high, and the thermal deformation temperature is greatly affected by crystallization, which greatly limits its application in the field of engineering plastics. On the other hand, PET used in engineering plastics is difficult to recycle due to its complex compo...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K9/06C08K7/14B29C47/92B29C48/92
Inventor 李莉王尹杰杨涛孟成铭
Owner SHANGHAI SUNNY
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