Poly(methyl methacrylate)/9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (PMMA/DOPO) compositions have been prepared by extruding and injection molding. The mechanical (i.e., tensile and flexural strengths, modulus, hardness), rheological (volume flow rate index) as well as thermal properties (Tg, Vicat softening temperature, oxygen index) of samples containing 1–10 wt parts of DOPO (per 100 wt parts of PMMA) have been analyzed. Additionally, FTIR analysis of modified PMMA has been made. The chemical reaction of both components has been observed during their processing and PMMA/DOPO compositions exhibited generally higher tensile strength, rigidity, hardness, volume flow rate index, and oxygen index. On the other hand, the addition of the mentioned phosphorous‐based component into a PMMA matrix reduced its impact strength, softening, and a glass transition temperature. Moreover, taking into consideration the thermal stability (i.e., temperature for 10 wt% mass loss in the air atmosphere) the mentioned parameter was reduced by a DOPO application as well. POLYM. ENG. SCI., 54:1030–1037, 2014. © 2013 Society of Plastics Engineers

Cationic acrylamide copolymers with diallyldimethylammonium chloride and terpolymers of the both monomers with N-vinylformamide were synthesized, characterized by capillary viscometry and their flocculation efficiency evaluated by extinction, sludge volume and solid matter recovery measurements. The polymerization reactions were carried out either as thin-layer processes in aqueous solutions or as microsuspension polymerization. The results from the numerous flocculation tests performed on model aqueous suspensions of fine coal, colloidal silica and talc have been presented and discussed. Flocculation efficiency was determined taking into account the type and dose of the used copolymer. Key words: acrylamid cationic copolymers and terpolymers, diallyldimethylammonium chloride, N-vinylformamide, flocculants, flocculation efficiency. KATIONOWE KOPOLIMERY I TERPOLIMERY AKRYLOAMIDU JAKO FLOKULANTY MODELO-WYCH SUSPENSJI WODNYCHStreszczenie -Kationowe kopolimery akryloamidu z chlorkiem diallilodimetyloamoniowym oraz terpolimery tych dwóch monomerów z N-winyloformamidem (schemat A) otrzymywano dwoma metodami: w cienkiej warstwie roztworu wodnego b¹dŸ w postaci mikrosuspensji (tabela 1). Scharakteryzowano je metodami wiskozymetrii kapilarnej (tabela 2) a tak¿e oceniono ich efektywnooeae floku-lacyjn¹ na drodze pomiaru ekstynkcji oraz objêtooeci i masy osadu poflokulacyjnego. Przedstawiono i przedyskutowano wyniki licznych testów flokulacyjnych przeprowadzonych na modelowych wodnych zawiesinach mia³u wêglowego (tabela 3, rys. 1), krzemionki koloidalnej (tabela 4, rys. 2) oraz talku (tabela 5, rys. 3). Efektywnooeae flokulacyjn¹ porównywano uwzglêdniaj¹c typ i dawkê u¿ytego flokulantu. S³owa

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