Molecular weight distributions and solution properties of poly(2‐trimethylammoniumethyl methacrylate chloride)

Abstract

dium c h l o r i d e s o l u t i o n s of varying i o n i c s t r e n g t h were i n v e s t ig a t e d w i t h u n f r a c t i o n a t e d samples i n t h e molecular weight range 7 , 7 x l O 6 Zu s amme n f as s un g An u n f r a k t i o n i e r t e n Proben d e s k a t i o n i s c h e n P o l y e l e k t r o l y t e n Poly ( 2-trimethylammoni ume t h y l m e t h a c r y l a t -c h l o r i d ) , PTMAC, m i t Molekulargewichten i m Bereich 7 , 7 x 1 0 4 Ew$l, 1x10 wurden Losungse i g e n s c h a f t e n i n wasrigen Natriumchloridlosungen v a r i a b l e r Ionens t a r k e durch L i c h t s t r e u u n g , V i s k o s i m e t r i e und Analyse d e r Sedimentationsgeschwindigkeit e r m i t t e l t . D i e Molekulargewichtsvert e i l u n g e n wurden durch AusschluRchromatographie und Sedimentationsgeschwindigkeitsexperimente e r h a l t e n und d e r EinfluR d e r P o l y d i sp e r s i t a t d e r Proben auf d i e s t a t i s c h e n und dynamischen Losungse i g e n s c h a f t e n durch g e e i g n e t e K o r r e k t u r v e r f a h r e n a u s g e s c h a l t e t . 3 7 D i e e r h a l t e n e n E r g e b n i s s e z e i g e n , da8 d i e Losungen von PTMAC i n 1 n NaCl i m w e s e n t l i c h e n m i t jenen ungeladener Polymerer i n organischen Losungsmitteln v e r g l i c h e n werden konnen.

Radiation Synthesis of Linear and Crosslinked Poly[2-(methacryloyloxy)ethyl]trimethylammonium Chloride and Complex Formation with Potassium Hexacyanoferrates (II, III) in Aqueous Solutions

“…The dose rate was determined with the help of a Fricke dosimeter and was equal to 1.8 Gy/ min. 6 ] have been studied in aqueous solutions by viscometric and turbidimetric measurements. The formation of complexes with certain stoichiometry depending on the nature of the low molecular ion was detected.…”

“…The addition of even small amounts of K 4 [Fe(CN) 6 6 ], respectively. It is probable that the complex formation is accompanied by inter-and intramolecular bridging of PMADQUAT by inorganic salts, and formation of insoluble crosslinked poly-complex aggregates.…”

“…Hydrogels of PMADQUAT immersed into aqueous solutions of K 3 [Fe(CN) 6 ] or K 4 [Fe(CN) 6 ] absorb these salts from the solution and undergo contraction. The dependencies of the equilibrium swelling degree of the The complexes of PMADQUAT hydrogels are stable and do not release the low molecular coordination compounds even after immersion in pure water for some months.…”

“…[1 -5] Poly [2-(methacryloyloxy)ethyl]trimethylammonium chloride (PMADQUAT) is an amphiphilic polyelectrolyte containing both hydrophobic groups (methyl groups and backbone chain) and hydrophilic positively charged tertiary amine groups in every elementary unit. Solution properties of PMADQUAT have been thoroughly studied by Stickler [6] and Griebel. [7] Kim [8] demonstrated the ability of PMADQUAT and its copolymers with alkyl methacrylates and acrylates to form complexes with some anionic drugs (sodium sulfathiazole and sodium diclofenac).…”

“…In the present work we report radiation synthesis and complex formation reactions between linear and crosslinked PMADQUAT and two inorganic coordination compounds K 3 [Fe(CN) 6 ] and K 4 [Fe(CN) 6 ]. We demonstrate that the stability of poly-complexes in respect to dilution can be enhanced if the low molecular ions have a higher negative charge.…”