Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Volumetric 3D Printing: Advances in Photopolymerization

Description

This lecture covers the principles of tomography and light sheet for volumetric printing, the cost of manufacturing in vat photopolymerization, the importance of polymers in additive manufacturing, and the chemical components in resins for stereolithography. It also discusses radical chain polymerization, the role of oxygen in photo-initiation, monomers for irreversible curing, and the use of photoinitiators. The lecture delves into Fourier transform, the central slice theorem, pattern filtering, the Radon transform, and backprojection in 3D printing. It explores the process of volumetric printing by tomography, including local absorbed light dose, gelation threshold, and insufficient cumulated dose for solidification.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Official source

Ontological neighbourhood

Chemistry

Organic chemistry: Polymer chemistry

Related concepts (32)

Polymerization

In polymer chemistry, polymerization (American English), or polymerisation (British English), is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are many forms of polymerization and different systems exist to categorize them. In chemical compounds, polymerization can occur via a variety of reaction mechanisms that vary in complexity due to the functional groups present in the reactants and their inherent steric effects.

Radical polymerization

In polymer chemistry, free-radical polymerization (FRP) is a method of polymerization by which a polymer forms by the successive addition of free-radical building blocks (repeat units). Free radicals can be formed by a number of different mechanisms, usually involving separate initiator molecules. Following its generation, the initiating free radical adds (nonradical) monomer units, thereby growing the polymer chain. Free-radical polymerization is a key synthesis route for obtaining a wide variety of different polymers and materials composites.

Radon transform

In mathematics, the Radon transform is the integral transform which takes a function f defined on the plane to a function Rf defined on the (two-dimensional) space of lines in the plane, whose value at a particular line is equal to the line integral of the function over that line. The transform was introduced in 1917 by Johann Radon, who also provided a formula for the inverse transform. Radon further included formulas for the transform in three dimensions, in which the integral is taken over planes (integrating over lines is known as the X-ray transform).

Monomer

In chemistry, a monomer (ˈmɒnəmər ; mono-, "one" + -mer, "part") is a molecule that can react together with other monomer molecules to form a larger polymer chain or three-dimensional network in a process called polymerization. Monomers can be classified in many ways. They can be subdivided into two classes, depending on the kind of the polymer that they form. Monomers that participate in condensation polymerization have a different stoichiometry than monomers that participate in addition polymerization: Other classifications include: natural vs synthetic monomers, e.

Fourier transform

In physics and mathematics, the Fourier transform (FT) is a transform that converts a function into a form that describes the frequencies present in the original function. The output of the transform is a complex-valued function of frequency. The term Fourier transform refers to both this complex-valued function and the mathematical operation. When a distinction needs to be made the Fourier transform is sometimes called the frequency domain representation of the original function.

Related lectures (32)

Cationic Polymerization: Synthetic Rubber

Explores cationic polymerization for synthetic rubber production, emphasizing initiation, propagation, and termination steps.

Reconstruction Algorithm: X-ray Images MOOC: Fundamentals of Biomedical Imaging: Ultrasounds, X-ray, positron emission tomography (PET) and applications

Explores backprojection reconstruction, spatial resolution challenges, filtered backprojection, and the link to Fourier transform.

Fourier Transform Applications: Image Processing Basics

Covers image processing basics, Fourier transformation, convolution, cross-correlation, and 3D reconstruction using the Radon projection theorem.

Polymer Synthesis: Basics and Techniques

Explores polymer synthesis basics, including step and radical chain polymerization, molecular weight control, copolymerization, and crosslinked polymers for microengineering.

Fourier Transforms in Tomography: Inversion Techniques