Die Polymerisation von Acrylmonomeren in Gegenwart aktiver Füllstoffe

Abstract

Die Besonderheiten des Ablaufs der radikalischen Polymerisation einiger Acrylmonomere in Gegenwart von hochdispersen aktiven Fullstoffen -Aerosil und Polyvinylchlorid-Pulverwerden unter Beriicksichtigung elementarer Reaktionen analysiert. Insbesondere werden die Reaktionskinetik und der Mechanismus der Startreaktion untersucht. Der EinfluB des Fullstoffs auf die physikalisch-mechanischcn und physikalisch-chemischen Eigenschaften der Polymere wird diskutiert. llonuncepuaayu~ Monoaepos axpmoeozo p s d a 8 npucymcrnsuu amnusnwx nanomurneneii Boro pnna B IIPACJ'TCTBHH BbIcoKoAHcnepcHbIx a K T m H b I x HanonHwreneia s p o c~n a A nopoluKa IIOJIHBHHHJIXJIO-acnexiToB II ~e x a~m~y npoTeKaHm peaKqmi m a q m p o R a H m . PaccMoTpeHo TaKme B n m m e HanonHmenn H a @ A~H K O -M~X~H A~~C K H~ A @ A~H K O -X H M H Y~C K H~ cRoicTsa nonnMepoB. The polymerization of acrylic monomers in the presence of active fillersThe pecularities of the radical polymerization of some acrylic monomers in the presence of highly disperse fillers, as aerosil and poly(viny1 chloride) powder, were investigated with respect to the basic reactions. Particularly, the kinetics and mechanism of initiation were considered. The effects of fillers on the physical and chemical properties of the B AaHHOa p a 6 o~e aHaJlA3ApJ'lOTCfl OCO6eHHOCTA npOTeKaHEiR p~AKanbHOfi nOJlAMepH3a~HH MOHOMePOB aKpHJI0-PAna (nBx) C YqeTOM WIeMeHTapHbIX PeaKQafi. Oco6oe BHHMaHHe J',W?JIeHO PaCCMOTpeHHIO KHHeTH9eCKHX polymers are discussed.

Emulsion Copolymerization of Butyl Acrylate with Watersoluble Monomers in the Absence of Emulsifier

“…Therefore, the probability of their bimolecular termination with the formation of associations of waterDownloaded by [University of Nebraska, Lincoln] at 23:07 27 December 2014 soluble surface-active oligomers also increases. These oligomers possess micelle-forming properties and promote nucleation [2]. The chain growth rate increases simultaneously, which leads to the growth of probability of oligomer reaching the critical chain length nCl, when they became insoluble and form PMP.…”

“…For more concentrated latexes such stabilization is not sufficient. It can be increased when hydrophobic monomers are copolymerized with ionizing or hydrophilic comonomers [2]. In the present work methacrylic acid (MAA) and acrylonitrile (AN) are used as such comonomers.…”

“…Such polymer emulsions consist of particles with "pure" surface and obtain some specific properties [2]. However, emulsion synthesis is complicated by the necessity of achieving of emulsion colloidal stability, which is achieved during the common emulsion polymerization by adding of emulsifier.…”