Die topologische Struktur und die Eigenschaften verdiinnter Losungen von verzweigten Polymeren auf Basis von Diallylestern der Sebazin-und Isophthalsaure wurden in einem weiten Bereich der Molekiilmassen untersucht. Die untersuchten Systeme stellen stark verzweigte Polymere dar, die kammartige und statistische Kurzkettenverzweigungen sowie eine groRe Anzahl intramolekularer Cyclen enthalten. In verdunnter Benzenlosung haben die verzweigten Polymere eine untere kritische Mischungstemperatur. In einem guten Losungsmittel weisen die polymeren Knauel sehr niedrige Werte der Grenzviskositat auf. Diese Erscheinungen hangen mit der besonderen topologischen Struktur der untersuchten Systeme zusammen. Topological structure and solution properties of branched diallylester polymersThe topological structure and properties of dilute solutions of branched polymers from diallylesters of sebacic and isophthalic acids have been investigated in a broad interval1 of molecular weights. The systems under study are highly branched polymers containing comblike and random short chain branchings and a large number of intramolecular cyclizations. In dilute solution in benzene the branched polymers exhibit a lower critical mixing temperature. In a good solvent the polymers have a very low intrinsic viscosity. These phenomena are discussed on base of the topological structure ofthe investigated systems.

Ergebnisse von Messungen der Temperatur-Frequenz-Abhangigkeit von Relaxationsprozessen in Oligoesteracrylaten unterschiedlicher chemischer Natur und daraus hergestellten veriietzten Polymeren werden diskutiert. Als Untersuclrungsmethoden wurden die magnetische Kernresonanz, dielektrische und dpamisch-mechanische Verfahren sowie die Radiothermolumineszenz eingesetzt. Mexa~u3.ub~ .rofieKysxpRpHoii no8sumxocmu e nosuMepux ofiueo3$upuKpufiamoe PaCCMOTpeHbI pe3yZbTaTbI PiCCJleAOBaHHFI TeMnepaTypHO-saCTOTHO~ 3aBHCAMOCTH penaKCaqH0HHbIX IIpO~eCCOB B o n~r o a @~p a~p~n a T a x pa3JlPiqHOfi XPiMHYeCKOfi IIpHpOAbI 12 TpeXMepHbIX nOJlPiMepaX H a Pix OCHOBe, Pi3peHHblX MeTOAaMH HMP, APi3JleKTpHYeCKPiM, APiHaMHYeCKHM MeXaHPiqeCHHM Pi paAPiOTepMOn~MRHeCqeHqHH. The mechanisiii of molecular mobility in polymer oligoester-acrylatesThe results of the investigation of the temperatur-frequence dependence of relaxation processes of oligoesteracrylates with different chemical nature and cross-linked polymers of oligoesteracrylates have been considered. These processes wcre studied by NhlR methods and dielectric, dynamic mechanical and radio-thermoluminescence techniques.

I I il 200 300 nm Fig. 5. Ultraviolet spectra of the metal-containing polyurethanes b e attributed t o t h e reduction in molecular weights in these polyurethanes o n dissolution due t o t h e dissociation of the metal-oxygen bonds. There m a y also b e partial reversible dissociation of t h e metal oxygen bonds, which will lead t o lower molecular weights in solution. Moreover it was also found t h a t t h e viscosity of t h e polymer solutions increased in t h e order Cd > Zn > Hg. Three-dimensional crosslinked polymers based on oligocarbonate(meth)acrylates with different chain lengthsThermal volume cxpansion, mechanical properties and thermostability of three-dimensional polymers of oligocarbonate(meth)acrylates have been studied by methods of dynamic dilatometry, longitudinal tension and thermogravimetry. With increasing length of the oligomeric unit the number and temperature position of the observed relaxation processes are changed, the values of tensile strength and modulus of elasticity are decreased, and the thermostability of the three-dimensional polymers is reduced.