The previous post described the work of Liebler [1] who showed both epoxy carboxylic acid networks and epoxy anhydride networks contained covalent adaptive networks that underwent transesterification reactions at elevated temperatures (i.e. vitrimers). The unique discovery in both epoxy systems was the viscoelastic behavior at elevated temperatures. Vitrimers are covalently bonded crosslinked networks. These networks […]

Polymer Innovation Blog

23.07.2024

Thermoset Re-use and Recycling – Part Five - Polymer Innovation Blog

In previous posts, the chemistry, and viscoelastic properties of vitrimers were presented. This post will discuss how vitrimers can be used in production to form thermoset parts/composites that can be reprocessed at end-of-life. For a network that contains covalent adaptive networks, as the temperature increases, exchange reactions such as transesterification in epoxy anhydride networks can […]

Polymer Innovation Blog

13.08.2024

Thermoset Re-use and Recycling – Part Six - Polymer Innovation Blog

The previous five posts discussed the end-of-life considerations using thermosets with covalently adaptive networks termed vitrimers. The next two posts will cover the chemical degradation approach to thermoset recycling. As shown schematically in Figure 1, there are multiple approaches to degrade fully cured thermoset networks. Figure 1. Schematic of chemical degradation methods for recycling [1] […]

Polymer Innovation Blog

20.08.2024

Thermoset Re-use and Recycling – Part Seven - Polymer Innovation Blog

The previous post described the chemistry and formulations using Recyclamine® hardeners. This post will discuss the process to chemically remove the cured network from the glass fabric reinforcement. Dubey et. al., describes the details of a formulation specifically designed for wet lay-up resin transfer molding RTM [1]. The recyclable RTM formulation was used to produce […]

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Thermoset Re-use and Recycling – Part Four - Polymer Innovation Blog

Thermoset Re-use and Recycling – Part Five - Polymer Innovation Blog

Thermoset Re-use and Recycling – Part Six - Polymer Innovation Blog

Thermoset Re-use and Recycling – Part Seven - Polymer Innovation Blog

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