Exact(4)
It was decided to limit the further study with resin concentrations kept at 50, 60, 70 gpl, as it showed best results with 60 and 90 gpl, too excess of resin was not considered as it would lead to excessive strength loss of cotton.
X-ray micro-tomography analyses reveals that two main defects are generated by the process, namely residual support material and excess of resin trapped inside the porous network.
The model parameters varied depending upon the ratio of resin to liquid employed in the tests, with rates showing substantial enhancement once an excess of resin exchange sites were present.
Briefly, a 3-fold excess of resin (vs a molar amount of peptide) was swelled in dichloromethane (DCM) for 40 min, after which the resin was washed with (three times each) DCM, dimethylformamide, methanol, deionized water, and a degassed 1 1 100 mM ammonium bicarbonate/acetonitrile mixture.
Similar(55)
Epoxy thermosets are commonly formulated with an excess of epoxy resin to ensure complete reaction of co-reactive hardeners and to optimize performance.
In this report, the preparation of controlled epoxy thermosets containing varying amounts of excess epoxy resin having essentially complete excess epoxy conversion is described.
However, the degree to which the reaction of the excess epoxy resin contributes to the thermal and mechanical properties of the thermoset is incompletely understood.
The polymerized blocks were removed from the BEEM capsules, and most of the excess resin was trimmed away with a razor blade under a stereo-microscope.
The phenomenon of super equivalent ion exchange (SEIX) was observed when the "driving force" for the exchange process was increased in excess of 2.25 mmol calcium ions per gram of resin in the starting solution.
In the presence of excess epoxy, resins transition from exhibiting homogeneous internal nanostructures to the familiar nodular morphology characteristic of epoxies.
A four-fold molar excess of Fmoc-protected amino acids to resin was used for coupling.
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