Determination of Mark-Houwink parameters for poly(N-vinylformamide)

Singley, E. J.; Daniel, Abishai; Person, D.; Beckman, Eric J.

doi:10.1002/(sici)1099-0518(19970915)35:12<2533::aid-pola24>3.0.co;2-7

Cited by 16 publications

(14 citation statements)

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“…[17] To avoid deamination reaction, NVF homo and copolymer was first subjected to acid hydrolysis (5 M HCl) and neutralized with NaOH solution (5%). Primary amine functions of the hydrolysis product were methylated using eschweiler-Clarke methylation procedure using formaldehyde-formic acid mixture.…”

Section: Oxygenation Of Linear Pvam-cobalt Complexesmentioning

confidence: 99%

Unusual oxygen affinity of linear polyvinyl amine–cobalt complexes with hydroxyl counter ions: an efficient way of separation and chemical storage of molecular oxygen

Ince

Gure

Bıçak

2016

Designed Monomers and Polymers

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Methylated poly(vinyl amine) and its copolymer with diallyldimethylammonium chloride (DADMAC) were prepared by polymerization of N-vinyl formamide (NVF) or copolymerization with DADMAC. Acid hydrolysis of the polymers and subsequent methylation yielded corresponding polyamines. Co(II) complexes of the polyamines were demonstrated to be reasonably fast in molecular oxygen binding, when counter anions of cobalt are exchanged with hydroxyl ions. The oxygenation tests performed with oxygen sensor, FT-IR, and gas-volumetric methods revealed that complexes either with 4/1 or with 2/1 [amine]/[Co] ratios give 1:1 molecular oxygen adducts. Fast oxygenation (c.a. 2-4 min), high storage capacity, and smooth oxygen releasing within 70-120 °C are typical characteristics of the oxygenation-deoxygenation. The system seems to be useful for harvesting and chemical storage of air oxygen.

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Section: Oxygenation Of Linear Pvam-cobalt Complexesmentioning

confidence: 99%

Unusual oxygen affinity of linear polyvinyl amine–cobalt complexes with hydroxyl counter ions: an efficient way of separation and chemical storage of molecular oxygen

Ince

Gure

Bıçak

2016

Designed Monomers and Polymers

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“…Data for ln η r / C and η sp / C are plotted and the data regressed (e.g., see Fig. 1), providing the intrinsic viscosity as the intercept 7…”

Section: Resultsmentioning

confidence: 99%

“…There are many ways to determine molecular weight such as end‐group analysis ( M n ),5 gel permeation chromatography (GPC) ( M n , M w , and M z ),1, 6, 7 H‐NMR technique ( M n ),8 membrane osmometry ( M n ),9 light‐scattering ( M w ),9 and viscometry method ( M v ). But most of these ways are time consuming.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic viscosity–number average molecular weight relationship for poly(1,4‐butylene adipate) diol

Yin

Zeng

2010

J of Applied Polymer Sci

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ABSTRACT:The relationship between number average molecular weight (M n ) and intrinsic viscosity ([g]) was studied for poly(1,4-butylene adipate) diol (PBAD) in tetrahydrofuran, toluene, and ethyl acetate at 25 C. Thus, a series of PBAD samples were prepared by polymerization between 1,6-adipic acid and 1,4-butanediol. The values of M n for the samples were determined by end-group analysis as well as by ebulliometry, and the average difference of M n between the two analysis ways was about 2.69%. The Mark-Houwink-Sakurada equations for PBAD were obtained to relate [g] with M n in the range of 1900-10,000.

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“…The polymerization was performed at 65 C for 4 h under argon atmosphere. Subsequently, the formed PNVF (with M w = 14500, determined using the Mark-Houwink equation 50 ) was converted to PVAm by hydrolysis in basic aqueous solution. For this purpose, 500 ml of 4 M NaOH was added.…”

Section: Synthesismentioning

confidence: 99%

Differences in Catalytic Activity of Poly(vinylamine) Introduced on Surface of Mesoporous SBA-15 by Grafting from and Grafting onto Methods in Knoevenagel Condensation

et al. 2015

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Various amounts of poly(vinylamine) (PVAm) were deposited on the surface of SBA-15 mesoporous silicas, pre-functionalized with suitable organosilanes, by two different grafting techniques -"grafting form" and "grafting onto". In the "grafting from" route, the radical copolymerization between the vinyl-modified SBA-15 and N-vinylformamide, followed by acid hydrolysis and neutralization, was performed. The "grafting onto" pathway consisted in the reaction of pre-prepared PVAm chains with epoxide functionalities present on the silica surface. DRIFT spectroscopy confirmed the formation of covalent and hydrogen bonds between PVAm and the pre-functionalized SBA-15 surface. Low-temperature N 2 adsorption and XPS allowed to observe differences in the distribution of formed PVAm in the pore system of SBA-15. A higher efficiency of polymer deposition and its higher dispersion were achieved using the "grafting from" method. Furthermore, XRD and TEM confirmed the stability of hexagonal SBA-15 structure during all modification steps. A number of accessible NH 2 surface species, considered as active sites, appeared to be a crucial parameter influencing the catalytic activity of the synthesized hybrid materials in the Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate.

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Determination of Mark-Houwink parameters for poly(N-vinylformamide)

Cited by 16 publications

References 0 publications

Unusual oxygen affinity of linear polyvinyl amine–cobalt complexes with hydroxyl counter ions: an efficient way of separation and chemical storage of molecular oxygen

Unusual oxygen affinity of linear polyvinyl amine–cobalt complexes with hydroxyl counter ions: an efficient way of separation and chemical storage of molecular oxygen

Intrinsic viscosity–number average molecular weight relationship for poly(1,4‐butylene adipate) diol

Differences in Catalytic Activity of Poly(vinylamine) Introduced on Surface of Mesoporous SBA-15 by Grafting from and Grafting onto Methods in Knoevenagel Condensation

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