Synthesis and study of polyalkylene phosphinic acids

Rafikov, S. R.; Chelnokova, G. N.; Yergebekov, M.Ye.; Yershova, T.V.

doi:10.1016/0032-3950(65)90237-6

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spectra of phosphonylated surfaces collected in this research are in close agreement with those obtained by other researchers 1, 2, 15, 26, 27. The P—O—H group has four characteristic frequencies: 2525 to 2725, 2080 to 2350, 1600 to 1740, and 917 to 1040 cm −1 26, 27. As seen in the figure, the first of these frequencies appears as a slight shoulder on the spectra, while the last three are readily apparent.…”

Section: Resultssupporting

confidence: 90%

“…For all other groups, spectra indicate apparent surface modification with the same characteristic peaks present for 30, 60, and 60 min at 45°C treatments. Spectra of phosphonylated surfaces collected in this research are in close agreement with those obtained by other researchers 1, 2, 15, 26, 27. The P—O—H group has four characteristic frequencies: 2525 to 2725, 2080 to 2350, 1600 to 1740, and 917 to 1040 cm −1 26, 27.…”

Section: Resultssupporting

confidence: 90%

See 1 more Smart Citation

Surface phosphonylation of low-density polyethylene

Allan

Dooley

Shalaby

2000

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

Surface phosphonylation of thermoplastic polymers was previously demonstrated in both the liquid and gas phase. For the present study, the phosphonylation process was modified through the use of a two-chamber reactor and a dynamic oxygen flow in an effort to secure greater control of the gas phase reaction. Low-density polyethylene films were phosphonylated at both ambient and elevated temperatures for time periods ranging from 15 to 60 min. Subsequently, all films were analyzed by SEM, EDX, horizontal ATR-FTIR, surface roughness, and dynamic contact angle measurements. Analysis of the data indicates that after 15 min at ambient temperature, films do not phosphonylate to a degree that could be detected by the chosen methods. Phosphonylation was achieved at 30 and 60 min at ambient temperature, and at 60 min at 45°C. The data indicate that optimal conditions for gas phase phosphonylation in the described apparatus are 25°C for times greater than 15 min but less than 60 min.

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 90%

Surface phosphonylation of low-density polyethylene

Allan

Dooley

Shalaby

2000

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

show abstract

Properties of polyethylene modified with phosphonate side groups. I. Thermal and mechanical properties

Weiß

Lenz

MacKnight

1977

J. Polym. Sci. Polym. Phys. Ed.

View full text Add to dashboard Cite

Low‐density polyethylene was modified by the inclusion of phosphonate ester pendent groups by using an oxidative chlorophosphonylation reaction followed by esterification of the polyethylene poly(phosphonyl chloride) with an alcohol. Two different types of phosphonate esters were prepared: dimethyl phosphonate from the reaction with methanol and a phosphonate graft copolymer from the reaction with hydroxy‐terminated poly(ethylene oxide) (PEO). For the latter, oligomers with molecular weights of 350 and 750 were used. For each type of phosphonate, a series of polymers were prepared with pendent group concentrations ranging from 0 to 9.1 substituents per 100 carbon atoms. The modified polymers were characterized by infrared spectroscopy, differential scanning calorimetry, and by measurement of the tensile modulus. Infrared spectroscopy proved to be useful for determining if the polymer modification reaction resulted in entirely phosphonate ester pendent group substitutions or if unesterified phosphonic acid groups were also present. The polymers prepared in this investigation exhibited no infrared absorbances arising from phosphonic acid groups. The presence of phosphonate ester groups resulted in a decrease of crystallinity with increasing phosphonate concentration and with the exception of the polymers containing 9.1 PEO–phosphonate grafts per 100 carbon atoms, the effect of phosphonylation on the melting temperature of the polymers was consistent with Flory's theory for the melting point depression of random copolymers. The tensile modulus measured from a constant uniaxial elongation experiment decreased with increasing phosphonylation. The behavior of all three phosphonate series was identical and could be attributed to the effect of decreasing polymer crystallinity.

show abstract