Effect of Newly Developed (Meth)acrylate Resins on Impact Strength in 3D Printing

Share this Article

The Challenge

Dymax is creating solutions that allow photopolymer-based 3D printing resins to meet or exceed the capabilities of thermoplastic materials such as polycarbonate or ABS, targeting superior impact and temperature resistance properties. The goal is improvements in impact strength while maintaining a high Heat Deflection Temperature (HDT).

The Trade-Off

Stronger UV-curable materials with high HDTs are generally low in impact resistance, being more inflexible or brittle due to a high degree of cross-linking in their molecular composition. On the other hand, high molecular weight materials with low crosslink density typically have a low HDT or are too high in viscosity to properly 3D print. To solve this persistent problem and achieve advancement in balancing these properties, chemists need to determine the best formulation approach to attain this balance of properties within a UV-cured polymer network.

The Materials

To identify the best options for 3D printing oligomer development, Dymax explored one concept for improving impact resistance by modifying hard, highly crosslinked networks with flexible impact-modifying resins. Dymax tested three experimental Hard Resins (HR) both alone and together with several Impact Modifying (IM) materials in a model formula. These materials were categorized by functionality and molecular weight, and included a range of backbone chemistries.

Printability

As Dymax researches and develops materials that balance HDT and impact resistance, we also must consider the limitations of the 3D printing process, including low formulation viscosities, limited light-source intensities, and cure dynamics of the 3D printing process. Formulators must also balance the need to achieve fast cure speed with the desire to minimize part shrinkage in order to achieve excellent print resolution and dimensional stability.

Tensile Properties

The formulations of HR/IM combinations with the best balance of impact resistance and HDT properties were subjected to additional testing to identify potential relationships to tensile strength and elongation. Materials with lower functionalities and molecular weight showed higher tensile strengths and somewhat reduced elongation. In some cases, the HR materials are able to be toughened through the IM modification with an increase in elongation as well as a constant or increased tensile strength.

The Results 

The data gathered in testing several urethane (meth)acrylate resins has allowed Dymax to expand the reach of light-curing 3D printing processes and gain powerful insight into improving both HDT and IM simultaneously, rather than simply sacrificing one for the other. As industry leaders in the chemistry, mechanical systems, and formulation expertise needed to provide total solutions to our 3D printing clients, Dymax will apply these learnings to continue to push our understanding and development even further. Download our new white paper.

Discuss this article and more on the 3DPrintBoard or comment below to tell us what you think.

Share this Article


Recent News

Stratasys Lays off 10 Percent of Workers

Anouk Wipprecht’s 3D-Printed Proximity Dresses Are Perfect for Social Distancing



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Imperial College London: 3D Printing Improved Biocompatible Implant Packaging

Cristina Gentili recently presented a thesis, ‘3D Printed Instrumented Packaging for Implantable Devices,’ to the Centre of Bio-Inspired Technology at the Imperial College London. While there is much research focused...

For a Personalized Look, Try a 3D Printed Pompillon Bow Tie

There’s something fantastically dapper about a bow tie, and a 3D printed version definitely takes this fashionable look the extra mile. Ties and bow ties, along with ascots and scarves,...

$50 Open-Source Colorimeter is Remarkable in Comparison to Commercial Models

Researchers from Michigan Technological University are applying chemistry to 3D printing, detailing their recent study in ‘Open-Source Colorimeter.’ A basic sensor, the colorimeter is made up of a simple light...

3D Printing and Mass Customization, Hand in Glove Part V

We know that we are using far too many materials in a quest for consumption, could recycle them and could use these recycled goods in high valued materials but why...


Shop

View our broad assortment of in house and third party products.


Subscribe To Our Newsletter

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from our 3DPrint.com.

You have Successfully Subscribed!