The present disclosure provides polytetrafluoroethylene having excellent stretchability.
Provided in the present disclosure is a polytetrafluoroethylene having a standard specific gravity of 2.175 or less and a thermal instability index (TII) of 20 or more.
Synthesis of 1,4-Diketones by Reaction of Bicyclic Lactams Derived from 4-Oxoalkanoic Acids with Organolithium Compounds
作者:Christine Wedler、Hans Schick
DOI:10.1055/s-1992-26159
日期:——
Bicyclic lactams obtained from ethyl 4-oxoalkanoates and 2-aminoethanol add saturated and unsaturated aliphatic lithium compounds forming the corresponding 1,4-diketones in 41-61% yield after acidic hydrolysis.