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Flame-resistant PET composite and preparation method thereof

A composite material and feeding port technology, applied in the manufacture of fire-resistant and flame-retardant filaments, single-component polyester artificial filaments, etc., can solve the problems of many by-products, low decomposition temperature, unfavorable industrial production, etc., and achieve by-product Less, the effect of improving the thermal stability of the product

Active Publication Date: 2017-05-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method is feasible, the preparation process is complicated, there are many by-products, and the by-products are not easy to remove by solvent washing, which is not conducive to industrial production
The by-products are generally substances with lower molecular weight and lower decomposition temperature, which will decompose during PET processing (280-300°C), thereby deteriorating the mechanical properties of PET and causing a decline in the mechanical properties of PET composites

Method used

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  • Flame-resistant PET composite and preparation method thereof
  • Flame-resistant PET composite and preparation method thereof
  • Flame-resistant PET composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 5g of CMSs into a quartz boat, place the quartz boat in a closed tubular muffle furnace, and first pass nitrogen gas for 10 minutes to replace and drive off the air in the muffle furnace. Keep the nitrogen flow rate at 150ml / min, raise the temperature of the muffle furnace to 800°C at a heating rate of 10°C / min, and keep the constant temperature for 2h. After the reaction, the temperature was naturally lowered to room temperature under a nitrogen atmosphere, and the product was collected to obtain annealed CMSs (ie, TCMSs).

[0029] figure 1 The XRD patterns of the raw CMSs and the annealed TCMSs are given respectively. It can be seen from the figure that CMSs has a broad diffraction peak at 22.83°, indicating that CMSs mainly exists in the form of amorphous carbon. After annealing, the diffraction peak of TCMSs at 21.64° narrows, and another diffraction peak appears at 43.57°. Both are characteristic peaks of graphitic carbon. The relative intensity and peak w...

Embodiment 2

[0042] Weigh 5g of CMSs into a quartz boat, place the quartz boat in a closed tubular muffle furnace, and first pass nitrogen gas for 20 minutes to replace and drive off the air in the muffle furnace. Keep the nitrogen flow rate at 200ml / min, raise the temperature of the muffle furnace to 600°C at a heating rate of 20°C / min, and keep the constant temperature for 5h. After the reaction, the temperature was naturally cooled to room temperature under a nitrogen atmosphere, and the product was collected to obtain annealed CMSs (ie, TCMSs).

[0043] Weigh 1 kg of PET slices, and dry them under vacuum at 130° C. for 8 hours, so that the moisture content of the slices reaches 28 ppm. Weigh 10 g of TCMSs, and also dry it under vacuum at 130° C. for 5 h. Add the dried PET slices to the main feed port of the twin-screw extruder with a frequency of 10Hz, add 10g TCMSs to the side feed port with a frequency of 7Hz, heat to 265°C for melt blending, wire drawing and pelletizing, and obtain...

Embodiment 3

[0046] Weigh 10 g of CMSs into a quartz boat, place the quartz boat in a closed tubular muffle furnace, and first pass nitrogen gas for 20 minutes to replace and remove the air in the muffle furnace. Keep the nitrogen flow rate at 200ml / min, raise the temperature of the muffle furnace to 700°C at a heating rate of 50°C / min, and keep the constant temperature for 3h. After the reaction, the temperature was naturally cooled to room temperature under a nitrogen atmosphere, and the product was collected to obtain annealed CMSs (ie, TCMSs).

[0047] Weigh 1 kg of PET slices, and dry them under vacuum at 130° C. for 8 hours, so that the moisture content of the slices reaches 28 ppm. Weigh 20g of TCMSs, and also dry it in vacuum at 130°C for 8h. Add the dried PET chips to the main feed port of the twin-screw extruder with a frequency of 13Hz, add 20g TCMSs to the side feed port with a frequency of 9Hz, heat to 275°C for melt blending, wire drawing and pelletizing, and obtain TCMSs / P...

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Abstract

The invention discloses a flame-resistant PET composite. The flame-resistant PET composite is prepared according to the following steps: adding TCMSs to a PET basal body for melting, blending, wire drawing and slicing so as to obtain TCMSs / PET slices containing the TCMSs of which the percentage by mass is 0.2-2%, wherein the TCMSs is a material obtained by heating CMSs under inert atmosphere to 600-800 DEG C and then performing annealing treatment for 30-120min, and can be used for preparing flame-resistant PET fibers. The composite disclosed by the invention can be added to the PET basal body for preparing the flame-resistant PET fibers, so that the fire resistance of the PET fibers can be improved, and the condition that the tensile strength of the PET fibers is reduced due to the addition of the CMSs is also obviously improved.

Description

technical field [0001] The invention relates to a functional material, in particular to a flame-retardant PET composite material and a preparation method of the material. Background technique [0002] Polymer materials can be widely used in construction, transportation, electronic appliances, and daily products, but at the same time, due to the combustion properties of most polymer materials, the risk and harm of fires are greatly increased. Therefore, it is very necessary to modify the flame retardant of polymer materials. [0003] There are two main types of flame retardants used in polymer materials: additive type and reactive type. Because reactive flame retardants will produce many side reactions and the preparation process is complicated, additive flame retardants are more popular, but additive flame retardants also have the disadvantage of being added in a large amount, which may easily cause a decrease in the mechanical properties of composite materials. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K7/18D01F6/92D01F1/07
CPCC08K7/18C08L2201/02C08L2203/12D01F1/07D01F6/92C08L67/02
Inventor 杨永珍薛宝霞牛梅白洁刘旭光侯文生戴晋明
Owner TAIYUAN UNIV OF TECH
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