Thermoplastic/thermoset grafted composites

Patent metadata

Field	Value
Publication number	US-10240012-B2
Application number	US-201615234438-A
Country	US
Kind code	B2
Filing date	Aug 11, 2016
Priority date	Aug 11, 2015
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

Disclosed are thermoset/thermoplastic composites that include a thermoset component directly or indirectly bonded to a thermoplastic component via a crosslinked binding layer between the two. The crosslinked binding layer is bonded to the thermoplastic component via epoxy linkages and is either directly or indirectly bonded to the thermoset component via epoxy linkages. The composite can be a laminate and can provide a route for addition of a thermoplastic implant to a thermoset structure.

First claim

What is claimed is:

1. A method for forming a composite comprising:
grafting a binding polymer to a first surface of a thermoplastic component, the thermoplastic component comprising a thermoplastic composition at the first surface, the binding polymer including a plurality of epoxy groups, the grafting including reaction of a first portion of the plurality of epoxy groups with a reactive functionality at the first surface of the thermoplastic component;
crosslinking the binding polymer via reaction of a second portion of the plurality of epoxy groups to form a crosslinked binding layer; and
directly or indirectly binding a second surface of a thermoset component to the crosslinked binding layer, the thermoset component comprising a thermoset composition at the second surface, the second surface being directly or indirectly bonded to the crosslinked binding layer via reaction of a third portion of the plurality of epoxy groups.

2. The method of claim 1 , wherein the thermoplastic composition comprises a high performance thermoplastic polymer.

3. The method of claim 2 , wherein the high performance thermoplastic polymer comprises a polyarylene sulfide, a polyaryletherketone, a polyetherimide, a polycarbonate, a polyimide, or a combination thereof.

4. The method of claim 1 , the method further comprising forming the thermoplastic component.

5. The method of claim 1 , wherein the thermoplastic component is a continuous fiber tape or tow.

6. The method of claim 1 , further comprising surface treating the thermoplastic component at the first surface prior to grafting the binding polymer to the first surface.

7. The method of claim 1 , the binding polymer having a number average molecular weight of about 2,000 or greater.

8. The method of claim 1 , the binding polymer including an epoxy density of about 10 or more epoxy groups per binding polymer.

9. The method of claim 1 , wherein the binding polymer comprises an epoxidized polybutadiene, an epoxidized polyisoprene, poly(glycidyl methacrylate) or a combination thereof.

10. The method of claim 1 , wherein the crosslinking occurs spontaneously in conjunction with reaction of the first portion of the plurality of epoxy groups.

11. The method of claim 1 , the crosslinking comprising addition of energy to the binding polymer.

12. The method of claim 1 , wherein the second surface is indirectly bonded to the crosslinked binding layer, the method further comprising reacting the third portion of the plurality of epoxy groups with one or more additional reactive groups.

13. The method of claim 12 , wherein the additional reactive groups are components of a secondary polymer grafted to the binding layer.

14. The method of claim 1 , wherein the thermoset composition comprises an uncured or partially cured epoxy, a polyimide, a bis-maleimide, a polyphenol, a polyester, or a combination thereof.

15. The method of claim 1 , wherein the thermoset component is a continuous fiber tape or a tow.

16. The method of claim 1 , further comprising locating the thermoset component adjacent to the crosslinked binding layer according to a fiber placement and/or fiber steering process.

17. The method of claim 1 , further comprising fusion welding a second thermoplastic component to the composite.

18. The method of claim 1 , further comprising locating a thermoplastic implant adjacent to the composite.

19. The method of claim 18 , further comprising locating the composite between the thermoplastic implant and a thermoset section.

20. The method of claim 19 , further comprising fusion welding a second thermoplastic component to the thermoplastic implant.

Assignees

• Univ South Carolina
• Univ Clemson

Inventors

• Van Tooren Michael
• Luzinov Igor

Classifications

• C08J2309/00

  Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• C08J5/128 Primary

  Adhesives without diluent · CPC title

• C08J2323/20

  having four to nine carbon atoms · CPC title

• C08J2463/00

  Characterised by the use of epoxy resins; Derivatives of epoxy resins · CPC title

• B29L2009/00

  Layered products · CPC title