Polymer Crosslinking

When it comes to polymers, “crosslinking” simply means adding bonds between polymer chains to join them together and improve the mechanical strength and corrosion resistance of the polymer. While there are many ways to crosslink polymers, each is typically custom designed for a specific polymer. XlynX’s goal was to develop a way of crosslinking almost any polymer, even nonfunctionalized or unreactive polymers, in a controlled manner using a single set of conditions.

The Wulff Group at the University of Victoria, headed by Professor Jeremy Wulff, took their cue from chemical biologists who have been using diazirines for decades to attach small molecules to proteins.

Wulff and his team took this concept and designed a molecule that could attach itself in two places at the same time. They successfully demonstrated the exceptional crosslinking ability of their new molecule on a number of different polymers including polypropylene, a saturated hydrocarbon polymer with very low-functionality.

Technical Description

How Diazirines work

Diazirines are three-membered rings with one carbon and two double-bonded nitrogen atoms.

On exposure to moderate heat (approx. 80 to 140oC), near-UV light (350 nm), or electrical current, diazirines rapidly break down into carbenes, which insert themselves into C–H, N–H, and O–H bonds. When two diazirine units are present in a single molecule, the resulting bis-diazirine acts as a crosslinker, covalently bonding two polymer chains together at the same time.

Diazirines react with even the most unreactive polymers, such as polyethylene and polypropylene, that are particularly challenging to bond. BondLynx, a bis-diazirine, can be used directly as a polymeric adhesive or applied to polymer textiles to link and strengthen the fibres.

Universal Crosslinker

BondLynx has successfully undergone adhesive testing on a wide range of polymers and polymer-metal combinations. It has been found to bond the following polymer substrates to themselves and to other polymers, metals, wood, etc.

  • Polyethylene (LDPE, HDPE, UHMWPE)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • Polycaprolactone (PCL)
  • Acrylics
  • Polyisoprene elastomers
  • Polyurethanes
  • Aramid and UHMWPE fabrics
  • Glass, ceramics, wood, paper, textiles, leather, elastomers, and some metals (eg. Al)

Product Pipeline

XlynX is developing a series of crosslinking molecules for use in a variety of applications. BondLynx Gen-I is the first in the series.

Download Safety Datasheet
Download Technical Datasheet

Research Papers

Partner with XlynX Materials

XlynX is looking for R&D partners to develop new and exciting applications for BondLynx and our expanding line of diazirine crosslinking chemicals. Current partners are working in the fields of adhesives, electronics, solar cells, biofouling, medical devices, ballistics, wind sports, and more. Contact us if you would like to discuss your specific bonding/strengthening/protection challenge.


“As a leading manufacturer of body armour products in Canada, PRE Labs had a privilege to test and use ultra-high performance fabrics crosslinked with BondLynx. This product has recently been introduced by XlynX Materials Inc, an emerging specialty chemical company with a focus on the development of cross-linking agents for different industrial applications.

Our evaluations to date have confirmed that these new generation cross linking agents can significantly enhance the tear and perforation resistance along with mechanical properties of high-performance fabrics.

XlynX Materials has developed a key chemical composition, which demonstrates excellent cross-linking properties and that is likely to play an important role in the future of high-performance ballistic materials.”

Brad Field, PRE LABS

Industry Applications

Universal Adhesive

BondLynx© is a revolutionary new type of adhesive that takes advantage of chemical crosslinking to form ultra-strong covalent bonds between a wide range of “impossible to bond” materials.

  • Failure resistant adhesion: strong covalent chemical bonds replace conventional mechanical bonds.
  • Easily bonds challenging polyolefin polymer materials: polyethylene, polypropylene, polystyrene, acrylics, etc.
  • Can even form bonds to fluoro-polymers under some conditions.
  • Also bonds polymers to glass, ceramics, wood, paper, textiles, leather, elastomers, and some metals (eg. Al).
  • Easy activation with moderate heating or near-UV light.

Fabric/Fiber Strengthener

Enhance woven, braided and knitted polymer materials with BondLynx© to increase puncture, tear and tensile performance. Create ultra-strong, previously impossible composite laminates.

  • The ultimate in light, strong fabrics and composites for the kite surfing and sailing markets.
  • Takes ballistic materials to the next level. More stopping power with less material delivers reduced weight and more comfort.

Material Transformation

Increase surface hardness with BondLynx© to deliver longer-wearing components.
Potential Application – Increase the working lifespan of medical implants such as prosthetic hips.


Increase surface hardness with BondLynx© to deliver longer-wearing components.

Potential Application – Increase the working lifespan of medical implants such as prosthetic hips.

Tissue Adhesion

Coming Soon!