Friedrich-Schiller-Universitat Jena, Sektion Chemie, 0 -6900 Jena Durch Additionsrcaktion von disekundaren Diamilen an DGEBA wurden a,w-Aminotelechele und glycidylterminierte Prepolymere erhalten. Mittels Elementaranalyse, Y,(VPO)-Werten, NMR-Spektroskopie und HPLC-Analyse wird die Struktur der Prepolymere belegt und die gesetzmallige Oligomerverteilung nachgewiesen. Tenexenanwe npenoauntepai na ocnoee 8uzauyuLhabnozo a&pa 6ucg5enoaa A u tlusrnopuunbix duantunos. Heculurnbie ~~O~C U~H O -~U H M~~ noauntepbi npucoeauneiwz nyTeM PeaKqHH IIpHCOeAHHeHllIi AHBTOPHYHbIX HHaMHHOB K AHrJIHqHABXbHOMY 3@Hpy 6 u c @ e~o n a A IIOJiJ'qeHbI a,W-aMHHOTeJieXeJlbI PI npenOnAMepb1 C I'JIHqHAHnbHbIMH KOHqeBMMH rpylIlTaMPI. MeTOAaMH 3JIeMeHTHOrO aHaJlH3a, onpenenemin MoneKynIipHoh MaccM, ~~M P -~I I~K T~O C K O~H H u XHAKOCTHO~ xpoMaTorpa@uu non BMCOKOM nasnemm Telechelic prepolymers of DGEBA and di-sec-diamines. Uncrosslinked epoxide-a,mine addition polymers. 29th comm. By the addition rcaction of di-sec-diamines with D G E B L have been prepared a,o-amino-telechelic and glycidylterminated prepolymers. By means of elemental analysis, N, (VPO) values, NMR spectroscopy, and HPLC analysis, the structure of the prepolymers has been proved and the regular distribution of the oligomers has been shown. J'CTaHOBneHbI CTPJ'KTYPa IIOJlyYeHHMX IIpeIIOnHMepOB EI 3aKOHHOMePHOe PaCIIPeneneHHe OJlHl'OMepOB.
This report compares two types of interfaces for HPLC–FTIR, an on–line and an off–line system. The on–line system consists of a flow cell and an IR beam condenser. In the off–line system, the diffuse reflectance of the solute is measured after evaporation of the solvent. Both systems have been compared with regard to detection and identification limits of the solute.
Normal phase HPLC provided the best conditions to identify less concentrated components by FTIR detection.
Reactive diluents of aromatic or aliphatic structure have been identified in epoxy resins of low and medium molecular weight.
The identification limit for off–line detection is at least one order of magnitude below the limit for on‐line detection.
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