3D Printing Thermally Stable High‐Performance Polymers Based on a Dual Curing Mechanism

Abstract

High-performance polymers are an important class of materials that are used in challenging conditions, such as in aerospace applications. Until now, 3D printing based on stereolithography processes can not be performed due to a lack of suitable materials. There is report on new materials and printing compositions that enable 3D printing of objects having extremely high thermal resistance, with Tg of 283 °C and excellent mechanical properties. The printing is performed by a low-cost Digital Light Processing printer, and the formulation is based on a dual-cure mechanism, photo, and thermal process. The main components are a molecule that has both epoxy and acrylate groups, alkylated melamine that enables a high degree of crosslinking, and a soluble precursor of silica. The resulting objects are made of hybrid materials, in which the silicon is present in the polymeric backbone and partly as silica enforcement particles.

Synthesis of bio-sourced liquid resins and their photopolymerization with poly(ethylene glycol) diacrylate in the roadmap to more sustainable digital light processing technologies

“…A T g of 34.0 °C was found by determining the maximum of the loss factor curve (tan δ ). 46 The elastic modulus was calculated to be 127.2 ± 5.8 MPa, according to eqn (S2) †. This value is the average from 3 replicas and the ranges provided indicate a confidence level of 95%.…”

Photopolymerization of Limonene Dioxide and Vegetable Oils as Biobased 3D-Printing Stereolithographic Formulation

“…SLA formulations contain two types of functionalities, one which is reactive via a cationic mechanism, and the other one which reacts via a radical mechanism. This dual-curing procedure has been reported in the past [19][20][21] and is actually employed in commercial SLA 3D-printing formulations [22]. By adding as little as 15% of the latter one to the cationic LDO-based formulation, we were able to design a monomer composition which was easily 3D-printed in current SLA 3D printers (Figure 1).…”

Space Durable 3D Printed High‐Performance Polymers Based on Cyanate Ester/Extended‐Bismaleimide

“…One of the major requirements for high-performance polymers is the ability to operate in harsh environments for prolonged periods while maintaining their superior properties. [30] Hence, the stability and degradation of the CE/E-BMI system were studied with regard to terrestrial conditions (relative humidity (RH) and elevated temperatures) and space environment hazards such as vacuum, ionizing radiation, and AO exposure.…”