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Polyester/nylon composite material as well as preparation method and application thereof

A nylon composite material, polyester technology, applied to polyester/nylon composite material, its preparation field can solve the problems of high specific gravity, insufficient fiber rebound, weakened performance, etc., and achieve excellent mechanical properties, short reaction time, compatibility Sexual improvement effect

Active Publication Date: 2021-12-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages are: high specific gravity, easy to degrade during processing, low long-term use temperature in water, not resistant to acid and alcohol, insufficient fiber rebound, poor hygroscopicity, poor fabric air permeability, easy to generate static electricity accumulation, easy to fluff
[0010] The direct addition of external compatibilizers makes the process steps more complicated and the cost increases. During the reaction process, there are group reactivity differences, the reaction is difficult to control, and undesirable side reactions such as cross-linking may occur, and the added third component increases the cost. The compatibilizer may also cause the weakening of certain properties (such as KIM S J, KIM D K, CHO W J, et al.Morphology and properties of PBT / nylon6 / EVA-g-MAH ternary blends prepared by reactiveextrusion[J].PolymEng Sci,2003, 43(6):1298-1311.)
It usually takes a long time to directly add an external catalyst to promote the ester-amide exchange reaction. In Comparative Example 3, we etched the composite material obtained by reacting polyester and nylon for 3 minutes in the presence of a catalyst. The SEM image is as follows: Figure 10 As shown in (c), the polyester particles are in the form of spherical particles agglomerated and piled up, indicating that the interfacial tension between the two phases is very high and the compatibility is poor; and the requirements for the reactor are relatively high, and continuous nitrogen purging is required, which increases the production process. cost, and prolong the cycle of the composite material preparation process, while long-term high temperature may degrade the polymer and destroy the structure of the molecular chain
[0011] Interfacially compatible composites of polyester and nylon are currently not available without the addition of a third component (external compatibilizer or external catalyst) compatibilizer
If an external compatibilizer is added, the process steps will become complicated and the cost will increase, and undesirable side reactions such as crosslinking will occur during the reaction, which will also cause some performance weakening; if an external catalyst is added, it will take a long time. Reaction time, not conducive to polyester / nylon composite applications

Method used

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  • Polyester/nylon composite material as well as preparation method and application thereof
  • Polyester/nylon composite material as well as preparation method and application thereof
  • Polyester/nylon composite material as well as preparation method and application thereof

Examples

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preparation example Construction

[0079] The present invention also provides a kind of preparation method of polyester / nylon composite material, comprises the steps:

[0080] Mixing the modified polyester and nylon, reacting in a molten state, and rapidly cooling below a specific temperature to obtain the polyester / nylon composite material;

[0081] The modified polyester contains sulfonate; preferably, the modified polyester is obtained by modifying the polyester with a sulfonate compound; more preferably, the sulfonate compound is selected from 2-hydroxy-3-allyl One or more of sodium oxypropanesulfonate, sodium 2-hydroxy-3-methacryloyloxypropanesulfonate, isoprenesulfonate, sodium sulfonate, potassium sulfonate;

[0082] The mass ratio of the modified polyester to the nylon is 8:2 to 2:8; preferably, the mass ratio of the modified polyester to the nylon is 6:4 to 4:6;

[0083] The specific temperature is lower than that of the modified polyester and the nylon with the lower glass transition temperature; pre...

Embodiment 1

[0131] Pretreatment: The PET pellets and PA6 pellets modified with sulfonate compounds were vacuum-dried at 100°C for 12 hours; wherein, the molar ratio of sulfonate compounds to PET was 4:96; the sulfonate compounds were selected from 2- One of sodium hydroxy-3-allyloxypropanesulfonate, sodium 2-hydroxy-3-methacryloxypropanesulfonate, isoprenesulfonate, sodium sulfonate, potassium sulfonate Multiple (the sulfonate compound in the following examples and comparative examples is selected the same as the sulfonate compound in the present embodiment).

[0132] Preparation process: Mix 20 parts by mass of modified PET pellets and 80 parts by mass of PA6 pellets (for example: 5min), add the mixed materials into the twin-screw extruder, and set the reaction temperature of the twin-screw extruder to: Zone I 250°C, 260°C in Zone II, 265°C in Zone III, 265°C in Zone IV, 265°C in Zone V, 265°C in Zone VI, 265°C in Zone VII, 265°C in Zone VIII, 265°C in the head; the reaction time is 3min, ...

Embodiment 2

[0142] Pretreatment: vacuum-dry PET pellets and PA6 pellets modified with sulfonate compounds at 110°C for 10 hours; wherein, the molar ratio of sulfonate compounds to PET is 4:96;

[0143] Preparation process: Mix 80 parts by mass of modified PET pellets and 20 parts by mass of PA6 pellets (for example: 5min), add the mixed materials into the twin-screw extruder, and set the reaction temperature of the twin-screw extruder to: Zone I 250°C, 260°C in Zone II, 265°C in Zone III, 265°C in Zone IV, 265°C in Zone V, 265°C in Zone VI, 265°C in Zone VII, 265°C in Zone VIII, 265°C in the head; the reaction time is 3min, after water cooling The temperature was lowered to 30°C within 1 min, and the composite material C80 / A20 was obtained.

[0144] Performance test: Because the sample is too brittle, that is, the impact strength is too small, it cannot be made into a sample.

[0145] SEM test: Weigh 1.5g of composite material C80 / A20 into 150mL of formic acid, and stir magnetically at 4...

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Abstract

The invention discloses a polyester / nylon composite material as well as a preparation method and application thereof. The polyester / nylon composite material comprises an amide group-[NHCO]-, an ester group-[COO]- and an internal compatibilization chain segment; the mass content of polyester in the polyester / nylon composite material is 20-80%; the internal compatibilization chain segment comprises a -SO2-NH-group and has a polyester / nylon internal compatibilization interface, and the internal compatibilization chain segment has a characteristic shoulder peak with chemical shift in a range of 118 ppm to 119 ppm in a nuclear magnetic carbon spectrum. According to the polyester / nylon composite material as well as the preparation method and application thereof of the invention, a sulfonate compound is grafted on a modified polyester on a polyester macromolecular chain so as to be subjected to ester exchange reaction with the nylon, and the formed internal compatibilization chain segment can enhance the compatibility of the polyester and the nylon, so that the prepared polyester / nylon composite material has good mechanical properties and can also be applied to the fields of textile fibers, engineering plastics and the like.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a polyester / nylon composite material, its preparation method and application. Background technique [0002] Nylon is a general term for thermoplastic resins containing repeating amide groups—[NHCO]—on the main chain of the molecule. It is a widely used polymer material with an annual output of tens of millions of tons. As an engineering plastic, aliphatic nylon has the advantages of low specific gravity, high tensile strength, excellent impact resistance, good wear resistance and self-lubrication, and is not easy to be thermally cracked during molding; as a fiber, it has wear resistance, resilience, and color fastness. It has the advantages of good strength, antistatic, anti-pilling, and the fabric feels soft; the disadvantages are easy water absorption, relatively large shrinkage, poor dimensional stability, insufficient light resistance, no acid and alkali resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08L87/00
CPCC08G81/00C08L87/005
Inventor 姚臻叶骐瑜马小珺陈宁洁胡激江
Owner ZHEJIANG UNIV
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