SpletIn addition, photopolymers tend to show significant post-cure shrinkage depending on the monomer concentration. Normal force control capability on the rheometer allows the vertical shrinkage to be measured during curing from the change in gap under a constant applied force. This can be used to calculate the percentage of post-cure shrinkage. SpletSuch shrinkage could be controlled by the degree of crystallinity in thermoplastic elastomers [16] or the curing mechanism and degree of vulcanization in thermoset elastomers. [17] ... [30] where viscous droplets of photopolymers are applied and cross-linked by UV light. The fourth group of 3D printing technologies also deals with ...
Enhanced reduction of polymerization-induced shrinkage
A substantial volumetric shrinkage can lead to distortion of the 3D printed parts. Therefore, curing shrinkage is an important quantity in the photopolymerization process of thermoset resins. The formation of covalent bonds of the crosslinked network increases the molecular packing density. As a result of … Prikaži več The material under scrutiny is a commercial standard clear PR48 resin from Colorado Photopolymer Solutions (Boulder, CO, USA). The PR48 is an acrylate-based photopolymer resin working with DLP … Prikaži več Photopolymer resins are liquid media that allow UV light penetration. The attenuation of light passing through the resin is a key phenomenon in the … Prikaži več In this study, two manufacturing platforms were used for the preparation of the samples, depending on the purposes of the experiments. An … Prikaži več The material properties of photopolymer materials are significantly affected by the UV lamp system used for curing. One of the most important aspects of UV exposure is UV irradiance (or intensity). Therefore, the UV … Prikaži več SpletPhenanthraquinone-doped polymethyl methacrylate (PQ/PMMA) photopolymers are considered to be the most promising holographic storage media due to their... DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online … crack kylling
What is a Photopolymer? Guide to Photopolymer Resin 3D Printing
SpletWhat is claimed is: 1. A blood collection tube for separation of whole blood into a cell-depleted phase and a cell-enriched phase comprising: a polymerizable composition having a predetermined density and flowability effective to allow sedimentation of the composition under a centrifugal force to a position between the cell-depleted phase and the cell … SpletPolymerization-induced shrinkage stress within bulk photopolymer networks represents one of the most pressing challenges for their application in 3D-printing, microelectronics … SpletResearcher/R&D Scientist in Fundamental and Applied Science. Polymer Chemist and Polymeric Materials Scientist in Surface Coatings, Adhesives, Sealants, Composites, Photopolymers and Related Applications. 15+ Years International Research Experience from Academia and Industry with Strong Focus on Continuous Improvements, incl. … diversity at work ferdman