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A kind of polyester/nylon composite material, its preparation method and use

A technology of nylon composite materials and polyester, applied in the field of polyester/nylon composite materials, its preparation, can solve the problems of high specific gravity, insufficient fiber rebound, increase the cost of production process, etc., achieve excellent mechanical properties, short reaction time, The effect of improving compatibility

Active Publication Date: 2022-07-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
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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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  • A kind of polyester/nylon composite material, its preparation method and use
  • A kind of polyester/nylon composite material, its preparation method and use
  • A kind of polyester/nylon composite material, its preparation method and use

Examples

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preparation example Construction

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

[0080] Mixing the modified polyester and nylon, reacting in a molten state, and rapidly cooling to 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, isoprene sulfonate, 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 the temperature of the lower glass transition temperature of the modified polyeste...

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-methacryloyloxypropanesulfonate, isoprene sulfonate, sodium sulfonate, potassium sulfonate or Various (the sulfonate compounds in the following examples and comparative examples are selected the same as the sulfonate compounds in this example).

[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 a twin-screw extruder, and the twin-screw extruder reaction temperature is set to: Zone I 250°C, II zone 260°C, III zone 265°C, IV zone 265°C, V zone 265°C, VI zone 265°C, VII zone 265°C, VIII zone 265°C, nose 265°C; reaction time is 3min, after water cooling Dropped to 30°C ...

Embodiment 2

[0142] Pretreatment: the PET pellets and PA6 pellets modified with the sulfonate compound were vacuum-dried at 110° C. for 10 hours; the molar ratio of the sulfonate compound and PET was 4:96;

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

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

[0145] SEM test: Weigh 1.5 g of composite C80 / A20 into 150 mL of formic acid, and stir magnetically at 45 °C for 4 h. After standing for 24 hours, the solid...

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Abstract

The invention discloses a polyester / nylon composite material, a preparation method and use thereof. The polyester / nylon composite material comprises an amide group—[NHCO]—, an ester group—[COO]— and an internal compatibilizing segment ; the mass content of polyester in the polyester / nylon composite material is 20% to 80%; the inner compatibilizing segment comprises -SO 2 The —NH— group has a polyester / nylon inner compatibilizing interface, and the inner compatibilizing segment has a characteristic shoulder peak with a chemical shift in the range of 118 ppm to 119 ppm in the carbon nuclear magnetic spectrum. In the present invention, the modified polyester with the sulfonate compound grafted on the polyester macromolecular chain undergoes a transesterification reaction with nylon, and the formed inner compatibilizing segment can enhance the compatibility of polyester and nylon, so that the prepared polymer Ester / nylon composite materials have good mechanical properties and can also be used in textile fibers, engineering plastics and other fields.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a polyester / nylon composite material, a preparation method and uses thereof. 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 thermally crack during molding; as a fiber, it has wear resistance, resilience, color fastness It has the advantages of good hardness, antistatic and anti-pilling, and the fabric feels soft; the disadvantage is that it is easy to absorb water, relatively large shrinkage, poor dimensional stability, insufficient light resistance, acid and alkali resistance...

Claims

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Application Information

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Patent Type & Authority Patents(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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