SYNOPSISGraft polymerization of methacrylic acid (MAA) to loomstate cotton fabric using the KMnO,/thioureadioxide system as the initiator was studied under different polymerization conditions. The polymerization reaction was assessed with respect to graft yield, homopolymer, total conversion, and graft efficiency. The magnitude of each of these characteristics was found to depend upon parameters such as concentrations of KMnO,, thioureadioxide, and MAA as well as liquor ratio, reaction time, and temperature of polymerization. Based on a detailed investigation of these parameters, the optimal condition for grafting is KMn04

The effects of hydrogen peroxide concentration, ferrous ion concentration, polymerization temperature and other factors on the graft polymerization of methacrylic acid and other vinyl monomers onto cotton using the redox system ferrous cellulose thiocarbonatehydrogen peroxide were investigated. Die Pfropfcopolymerisation von Baumwollgewebe mit Vinylmonomeren unter Verwendung des Redoxsystems Eisencellulosethiocarbonat-WasserstoffperoxidDer EinfluB der Wasserstoffperoxidkonzentration, der Few-Konzentration, der Polymerisa tionstemperatur und weiterer Faktoren auf die Pfropfung von Methacrylsaure auf Baumwolle mit dem Redoxsystem Eisencellulosethiocarbonat-Wasserstoffperoxid wurde untersucht. In die Untersuchung wurden einige weitere Vinylmonomere mit einbezogen.

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A new series of the title pyrazole azo dye systems has been synthesized. The new dyes are applied on nylon and cellulose acetate fibers to give dyed fabrics with excellent properties of colour intensity and fastness properties. The physical and spectral data of the investigated dyes are illustrated. The shifts of ultraviolet‐visible absorption maxima affected by the structural configuration of the pyrazole dye systems are investigated. The structural effects of the polyfunctionally substituted pyrazole dye systems on the intensity of colour and fastness properties of the dyed fabrics are discussed. The data of these studies are listed. The colour shades of the synthesized dyes on nylon and acetate fabrics are indicated.

Hypochlorite oxidation of poly(methacry1ic acid)-cotton graft copolymers was examined and compared with that of ungrafted and initiator-treated cottons. The extent and rate of oxidation, carboxyl content, copper number, and tensile strength were measured in dependence of time. The results are discussed with respect t o the structure of the original and the grafted cotton. Der EinfluP oon Abbaubehandlungen auf Baumwoll-Pfropfcopolymere. Teil I I I . Oxidation von Poly(methacry1sciure)-Baumwoll-Pfropfcopolymeren durch NatriumhypochloritDie Oxidation von Poly(methacry1saure)-Baumwoll-Pfropfcopolymeren mittels Hypochlorit wurde untersucht und mit der Oxidation von ungepfropfter sowie nur mit dem Initiator behandelter Baumwolle verglichen. AusmaB und Geschwindigkeit der Oxidation, Carboxylgehalt, Cupferzahl und ReiBfestigkeit wurden in Abhangigkeit von der Zeit gemessen. Die Ergebnisse werden anhand der Struktur der Ausgangs-und der gepfropften Baumwolle diskutiert. BnuJinue aecmpykyuonnod 06paboml~u npueumacx cononufiepoe xfionica. Yacmb I I I . Okucnenue zunoxfiopumo-~ nampua npueumbm cononwepoe xfionxa c nofiuwrnaicpufioeoCi nucnomoCi~CcJreAOBaHO OKHCJIeHHe rHIIOXJIOpHTOM IIpHBHTbIX COnOJIHMepOB XJIOIIKa C nOJIHMeTaKpH3OBOfi KHCJIoTOfi, a TaKme OKUCJIeHEle HenpHBHTOrO XJIOIlKa H XJIOnKa 0 6 p a 6 0~a~~o r o TOJIbKO HHHqHaTOPOM. B 3aBHCHMOCTH OT Bpe-MeHIl H3MepHJIHCb r n y 6~a a H CKOpOCTb OKHCJIeHMH, COAepmaHHe Kap6OKCHJIbHbIX rpynll, MeAHOe YHCJIO M npO4-HOCTb pa3pbIBa. Pe3yJIbTaTbI 06cym~am~cfx H a OCHOBe CTpYKTpbl HCXOAHOrO H UPHBElTOrO XJIOnKa.