Positron Age-Momentum Correlation Studies of Free Volumes in Polyethylenimine-Modified Mesoporous Cellular Foam
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By varying the mass ratio of the amphiphilic triblock copolymer (P123) to 1,3,5-trimethylbenzene (TMB), alongside the content and molecular weight of polyethylenimine (PEI) and the incorporation of catalyst ammonium fluoride (NH4F), four distinct types of poly... ...