Plasma polymerization of selected organic compounds

Dilsiz, N
Akovali, G
Plasma polymerization reactions and plasma polymers of xylene/air, xylene/argon, xylene/air/argon, toluene/air/argon, dioxane and allyl cyanide were compared with respect to discharge power (between 50 and 500 W), where all other plasma operational parameters were kept constant. In plasma polymerization, the glow characteristics are known to play an important role depending on the factor W/F,where W is the discharge power and Fis the monomer flow rate. In plasma polymerization reactions, it is known that decomposition of the monomer and/or polymer produced competes with polymer formation. Above a certain power level, polymer decomposition may become the predominant reaction, and hence polymer deposition rates decrease with increasing discharge power. The plasma polymer films were characterized by Fourier transform infra-red spectroscopy, elemental analysis and thermogravimetric analysis. Infra-red spectra of the plasma polymers obtained indicated that when the discharge power was increased, the absorption intensities of all the functional groups decreased. The deposition rates and chemical structures of the plasma polymers prepared appeared to depend strongly on the structure and characteristics of the monomer used and on the conditions of discharge and other operational parameters.


Nanohardness measurements of heavy ion irradiated coarse- and nanocrystalline-grained tungsten at room and high temperature
El-Atwani, O.; Weaver, J. S.; Esquivel, E.; Efe, Mert; Chancey, M. R.; Wang, Y. Q.; Maloy, S. A.; Mara, N. (Elsevier BV, 2018-10-01)
Heavy ion irradiation was performed on coarse and nanocrystalline-grained tungsten (CGW and NGW, respectively) at room temperature (RT) and 1050 K from 0.25 to 4 dpa to simulate radiation damage for fusion energy applications. TEM and nanohardness measurements of irradiated samples were made to quantify the radiation tolerance of these two candidate materials. In this case, TEM is used to quantify the defect morphology at low dpa values and determine the barrier strength coefficients of the different defect...
ORHAN, BO; AKOVALI, G (1991-08-01)
Plasma initiated polymerization and copolymerization is applied to two model compounds, styrene and methylmethacrylate, in a series of experiments. For this polymerization tubes with break seals in the middle having two different compartments are used. For samples without and with break seals-the latter is broken right after discharge-a random copolymer rich product; while for the others with break seals broken after certain times, a block copolymer is obtained, as traced out by NMR and IR studies.
Microwave-assisted simultaneous synthesis of conducting, non-conducting and cross-linked polymers from sodium 2,4,6-tribromophenolate and LiOH
Celik, Gueler Bayrakli; Kisakuerek, Duygu (Informa UK Limited, 2007-01-01)
Poly(dibromophenylene oxide) (P) and conducting polymer (CP) and/or cross-linked polymer (CLP) were synthesized simultaneously from sodium 2,4,6-tribromophenol ate and LiOH by microwave energy in a very short time interval. Polymerizations were carried out (i) under constant microwave energy and constant amount of water with different time intervals ranging from I to 20 min, or (ii) at constant time intervals and constant amount of water with variation of microwave energy ranging from 90 to 900 W, or (iii) ...
Ion beam synthesis and characterization of Ge nanoparticles in SiO2
Desnica, U. V.; Buljan, M.; Dubcek, P.; Siketic, Z.; Radovic, I. Bogdanovic; Bernstorff, S.; Serincan, U.; Turan, Raşit (Elsevier BV, 2006-08-01)
Ge quantum dots embedded in SiO2 have been obtained by implantation of Ge ions in the 10(16)-10(17) cm(-2) dose range, followed by post-implantation annealing in the temperature range T-a = 300-1000 degrees C. Using Rutherford back-scattering, grazing incidence X-ray diffraction and grazing incidence small angle X-ray scattering it was found that Ge-QDs are synthesized as discrete, spherical QDs, with radius ranging from 1.7 to 10 nm, depending on dose and T-a. For T-a above 800 degrees C the Ge atom diffus...
Hasırcı, Nesrin (1987-08-20)
Polymerization of hexamethyldisiloxane (HMDS) on aluminum by application of capacitively coupled plasma was carried out under different polymerization conditions. The effect of applied frequency, power, and discharge duration on polymerization rate was investigated. Film adhesion was found to be directly related to applied frequency and power. Polymer deposits were examined with SEM and ATR, and the effect of the coat on wattability was sought by measuring the contact angles. The chemical structure of the c...
Citation Formats
N. Dilsiz and G. Akovali, “Plasma polymerization of selected organic compounds,” POLYMER, pp. 333–342, 1996, Accessed: 00, 2020. [Online]. Available: