Abstract
“Secondary electron hyperspectral imaging (SEHI) is an innovative SEM-based analysis tool allowing spatially-resolved chemical analysis beyond elemental composition”.
Highlights
The distributions of methylene and ether bridges have been shown to impact the mechanical properties of phenolic resin
This work demonstrates the ability of the novel scanning electron microscope (SEM) based technique, secondary electron hyperspectral imaging (SEHI), to characterise and map methylene and ether bridges within phenolic resin at the nanoscale
This study focuses on analysing the chemical bonding structure of a form of phenolic resin, PR382
Summary
The distributions of methylene and ether bridges have been shown to impact the mechanical properties of phenolic resin. Further work towards delivering ‘tougher’ phenolic resins has investigated altering the polymer network of the resin by changing the bonding ratios of methylene and ether bridges.[12,13] This work has identified improvements to the efficiency of the resin’s production process which mitigate environmental concerns of current practice. Despite the improved functionality of such resin more efficient and potentially greener ways of improving toughness of phenolic resin have come from studies targeted at altering the polymer network of phenolic resin by changing the bonding ratios of methylene and ether bridges have delivered tougher materials.[12,13] The proportion of ether bridges rises with increases in the F : P (formaldehyde : phenol) ratio, with an excessive amount of ether linkages[14] reducing the strength of the cured resin.[15] It is important to note that processing conditions are influential on the final strength of the cured resin
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