Influence of the degree of substitution on the solution properties of chloromethylated polysulfone

Abstract

ABSTRACT:The conformational behavior and unperturbed dimensions of polysulfone and chloromethylated polysulfone with different degrees of substitution were investigated by viscometry in N,N-dimethylformamide; we intended to use these results with more complicated structures with different properties and applications. The effects of concentration and temperature on the coil densities and dimensions and of chlorine content on the unperturbed dimension parameters are discussed.

Preparation and characterization of imidazolium-functionalized poly (ether sulfone) as anion exchange membrane and ionomer for fuel cell application

“…S1, the A(H f ) of the CMPES increases with the chloromethylation time, which reflects the increase of DCM. Moreover, it was found that the [h] of CMPES rose with the increase of DCM (Table 1), which is consistent with the previous study results [19].…”

Surface properties and antibacterial activity of quaternized polysulfones

“…For example, these groups can modify the hydrophilicity (which is of special interest for biomedical applications), 15 antimicrobial action, 16 and solubility characteristics 17,18 to allow higher water permeability and better separation. 19,20 In addition, functional groups are an intrinsic requirement for affinity, ionexchange, and other specialty membranes.…”

Biocompatibility and Antimicrobial Activity of Some Quaternized Polysulfones

“…Also, polysulfones with bulky phosphorus pendant groups (PSF-DOPO) are obtained by chemical modification of the chloromethylated polysulfone, performed by reacting the chloromethyl group with the P-H bond of 9,10-dihydro-oxa-10-phosphophenanthrene-10-oxide (DOPO) (Petreus et al, 2010 Table 1 lists the chlorine content, substitution degree, molecular weights of the structural units, 0 m , number-average molecular weights, n M , and intrinsic viscosities determined in N,N-dimethylformamide (DMF) at 25°C of polysulfone and chloromethylated polysulfones (Ioan et al, 2006a). The characteristics of quaternized polysulfones PSFQ1 and PSFQ2 (Ioan et al, 2006b), and also PSF-DMEA and PSF-DMOA (Filimon et al, 2010) are presented in Table 3.…”

“…The quaternized polysulfones tested for biomedical applications, such as PSFQ, PSF-DMEA and PSF-DMOA, are obtained by quaternized reaction (Luca et al, 1988) of chloromethylated polysulfones (CMPSF) with N,N-dimethylethanolamine (Filimon et al, 2010;Ioan et al, 2006aIoan et al, , 2006bIoan et al, , 2007), N,N-dimethylethylamine, and N,Ndimethyloctylamine (Ioan et al, 2011a), respectively. Also, polysulfones with bulky phosphorus pendant groups (PSF-DOPO) are obtained by chemical modification of the chloromethylated polysulfone, performed by reacting the chloromethyl group with the P-H bond of 9,10-dihydro-oxa-10-phosphophenanthrene-10-oxide (DOPO) (Petreus et al, 2010 Table 1 lists the chlorine content, substitution degree, molecular weights of the structural units, 0 m , number-average molecular weights, n M , and intrinsic viscosities determined in N,N-dimethylformamide (DMF) at 25°C of polysulfone and chloromethylated polysulfones (Ioan et al, 2006a).…”

“…Studies are carried out on the quaternization reaction of chloromethylated polysulfones with N,N-dimethylethanolamine (Filimon et al, 2010;Ioan et al, 2006aIoan et al, , 2006bIoan et al, , 2007, N,N-dimethylethylamine and N,N-dimethyloctylamine (Ioan et al, 2011a), for obtaining water soluble polymers with various amounts of ionic chlorine, or on the new polysulfones with bulky phosphorus pendant groups, obtained by chemical modification of the chloromethylated polysulfones by reacting the chloromethyl group with the P-H bond of 9,10-dihydro-oxa-10-phosphophenanthrene-10-oxide (Ioan et. al., 2011b).…”