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Modified Poly(trimethylene terephthalate) resin

A technology of polytrimethylene terephthalate and trimethylene phthalate, which is applied in the field of modified materials, can solve the problems of tensile strength, decrease in modulus, and non-enhancing toughness, so as to improve the application effect and improve the application field. Effect

Inactive Publication Date: 2008-11-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rubber can greatly improve the toughness of polymer structural materials, but the traditional rubber toughening generally has the disadvantage of "toughening without strengthening", that is, while improving the toughness, the tensile strength and modulus of the material are relatively large. drop in magnitude

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 4 g of magnesium salt whiskers were surface-treated with 1.5% (parts by mass) of titanate coupling agent.

[0037] Get the magnesium salt whisker 4kg that handles well, and 10kg PTT (intrinsic viscosity is 0.92dl / g, and density is 1.35g / cm -3 ), 2kg of EPDM rubber (EPDM) were evenly mixed, mixed and granulated with a twin-screw extruder.

[0038] According to the standards of GB1039, GB1043, GB1040, etc., the prepared pellets are prepared through the injection molding machine to prepare standard specimens, and the mechanical properties are measured.

[0039] The properties of the resulting material are as follows:

[0040] The notched impact strength of simply supported beam is 9.12kJ / m 2 , The tensile strength is 102MPa.

[0041] As a comparison, the notched impact strength of pure PTT is 4.8kJ / m 2 , The tensile strength is 67.6MPa.

Embodiment 2

[0043] Others are the same as in Example 1, wherein: the polytrimethylene terephthalate resin is a mixture of two different viscosities, said viscosities are respectively 0.65dL / g and 1.25dL / g, and the mixing weight ratio is 1:1; Magnesium salt whiskers are replaced by nano-montmorillonite with a particle size of 40 μm, and the properties of the obtained material are as follows:

[0044] The notched impact strength of simply supported beam is 8.12kJ / m 2 , The tensile strength is 93Mpa.

Embodiment 3

[0046]Others are the same as in Example 1, wherein the substrate PTT is replaced by a compound (proportioning 80: 20) of PTT and nylon 66, and the resulting material properties are as follows:

[0047] Charpy notched impact strength is 9.02kJ / m 2 , The tensile strength is 98Mpa.

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Abstract

The invention provides modified polytrimethylene terephthalate resin, comprising polymer matrix, strengthening agent and toughener. The compositions by weight portion of the modified polytrimethylene terephthalate resin are: 100 portions of polymer matrix, 1 to 80 portions of reinforcing agent, and 1 to 40 portions of toughener. The polymer matrix is polytrimethylene terephthalate resin with single viscosity, a mixture of polytrimethylene terephthalate resin with viscosities of different properties, or a compound of polytrimethylene terephthalate resin and other high molecular polymers; the strengthening agent is selected from fiberglass, acicular wollastonite, attapulgite, sheet talcum powder, nano-mica powder, nano-montmorillonite, inorganic crystal whisker, organic crystal whisker or a nano-carbon tube; and the toughener is selected from inorganic particles, rubber or thermoplastic elastomer. The modified polytrimethylene terephthalate resin can realize strengthening effect and toughening effect at the same time, greatly improve the application effect and the application field of the polytrimethylene terephthalate resin, and can meet requirements in related aspects.

Description

technical field [0001] The invention relates to a modified material based on polytrimethylene terephthalate resin. Background technique [0002] Polytrimethylene terephthalate resin (abbreviated as PTT, the same below) is newly developed after polyethylene terephthalate (PET) in the 1950s and polybutylene terephthalate (PBT) in the 1970s. A promising new type of polyester polymer material, it was rated as one of the six new petrochemical products by the United States in 1998. Due to its excellent comprehensive properties, it is considered to be a promising new type of polyester material in the 21st century. In order to make better use of the many excellent properties of PTT and expand its market influence, in addition to further development in the fiber field, it can also be used in monofilament, polyester dyeing agent, film, thermoplastic engineering plastics and non-woven fabrics. Develop PTT applications in cloth and other fields. Especially in the field of engineering...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K3/00C08K7/02C08K9/04C08L23/16
Inventor 陈彦模王坤燕张瑜陈龙俞昊吴文华
Owner DONGHUA UNIV
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