Herrn Professor Dr. Dr. h. c. Hermann Klare zum 75. Geburtstag gewidmet Als wesentliche Voraussetzung fur Untersuchungen zur thermischen Stabilitat von PVC wurde der Gehalt an isolierten und koiijugierten Doppelbindungen sowie Ketochlorallylgruppen quantitativ bestimmt. Die Beurteilung des Einflusses dieser Defektstrukturen der Polymerkette erfolgte durch Messung des Dehydrochlorierungsverlaufes unter isothermen und nichtisothermen Bedingungen. Die Ergebnisse zeigen, daR lediglich Ketochlorallylgruppen effektiv eine erhohte Initiierungsgeschwindigkeit bewirken.0 xunemuxe mepauuecxo8 d e c m p y q u u 17BX. I . liccAedosanuJt no codepxanulo 8e&exmnb&x cmpyxmyp u no ux efiuanum na mep~ocma6ufianocmb KOJIHYeCTBeHHO 6~x 0 OIIpeAeJIeHO COJ(ep?KaHHe M30JIHPOBaHHbIX H COIIpFIXWHHbIX ABOPHbIX CBFI3eB, YTO FIBJIFIeTCR BaWHOfi IIPeJ(IIOCbIJIK0~ AJIH HCCJIeAOBaHHFI T e p M M q e C K O~ CTa6HJIbHOCTH n B X . O q e H K a BJIHRHAFI BTHX J(e@eKTHbIX CTPYKTYP IIOJIHMepHOfi IIeIIH 06OCHOBbIBaeTCFI H a H3MepeHHM J(eIWJ(pOXJI0pHpOBaHHFI B H30TePMHYeCKHX Pi H e H 3 0 -
TePMHqeCKHX YCJIOBHIRX. P e 3 y J I b T a T b I IIOKa3bIBaDT, 4TO TOJIbKO KeTOXJIOpaJIJIHJIbHbIe P p y n n b I e@$eKTHBHOBeAyT K IIOBbIIIIeHHD CKOPOCTH EIHHqHHPOBaHHFI.
On the kinetics of thermal degradation of PVC. I . Investigations on the content of anomalous structures and their influence on thermal stabilityAs a prerequisite for investigations on thermal stability of PVC the content of isolated and conjugated double bonds as well as keto chloroallylic groups were evaluated. The influence of this anomalous structures in PVC on stability was investigated by isothermal and non-isothermal measurements of the rate of dehydrochlorination. The results indicate that only keto chloroallylic groups cause an effective increase of the rate of initiation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.