Synthesis and properties of chlorinated polyimides

Han, Ki Jun; You, Kyunghee; Jang, Woo–Hyuk; Rhee, Taehyun

doi:10.1002/(sici)1521-3935(20000301)201:6<747::aid-macp747>3.0.co;2-m

Cited by 25 publications

(26 citation statements)

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“…An increase in the density of C-Cl bonds at the expense of C-H bonds tends to increase the refractive index of conventional polymers since the former have more polarizable bonds [28,29]. A similar mechanism might occur in amorphous films.…”

Section: Optical Propertiesmentioning

confidence: 99%

Characterization of amorphous hydrogenated chlorinated plasma polymers

Rossi

Schreiner

Durrant

2016

Surface and Coatings Technology

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Thin films were produced by plasma enhanced chemical vapor deposition from propanol-chloroform-argon mixtures. The main system parameter studied was the percentage of chloroform in the chamber feed, C Cl. Plasma polymers doped with chlorine were produced at deposition rates of up to 110 nm min −1. As revealed by infraredand X-ray photoelectron spectroscopy, the films consisted of a hydrogenated carbon matrix with a carbon content of at least 80 at.%, and a roughly constant oxygen content of about 12 at.%. A maximum chlorine content of~8 at.% was obtained. The surface contact angle of the films was around 75°, and was reduced slightly at greater chlorine contents. Optical properties were obtained from ultraviolet-visible-near infrared spectroscopic data. While the refractive index of the films was around 1.56 independently of C Cl , the chlorinated films showed a distinct optical gap of~2.5 eV compared to~1.9 eV for the unchlorinated film.

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Section: Optical Propertiesmentioning

confidence: 99%

Characterization of amorphous hydrogenated chlorinated plasma polymers

Rossi

Schreiner

Durrant

2016

Surface and Coatings Technology

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“…It was reported that the absorption due to CAH bonds could be reduced by the replacement of hydrogen in the CAH bonds to heavy atoms such as fluorine and chlorine. 13,14 Three CAH bond vibrational absorption peaks also could be observed in the near IR region, although all the PIs had the optical loss: (1) the CAH first stretching overtone band (m CAH ) around 1650 nm; (2) the weaker a The refractive indices of the polymer films were obtained using a spectroscopic ellipsometer. b The birefringence of the polymer films were measured by the method of coupling angles of TE or TM optical modes with a prism at 650 nm.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…[3][4][5] The introduction of fluorinated groups in PIs is a very effective method, and the most research focuses on the PIs with trifluoromethyl groups (CF 3 ) due to their easier synthesis, excellent thermal stability and mechanical properties. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] Usually, substitution of hydrogen by a fluorine atom can shift the associated vibrational overtone of C-H to longer wavelengths. [20][21][22][23][24] Furthermore, halogenations, particularly fluorination, can offer interesting opportunities for enhancing the sol-ubility and raising the optical transparency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of novel polyimide optical materials with different haloid pendant

Xing

Wang

Gao

et al. 2011

J of Applied Polymer Sci

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To investigate the difference of trifluoromethyl group and chlorine group affecting the optical properties of polyimides (PIs), two diamine monomers with different haloid pendants were designed and synthesized including (1,4‐(4‐amino‐2‐trifluoromethylphenoxy)‐2‐(3′5′‐ditrifluoromethylphenyl)benzene and (1,4‐(4‐amino‐2‐trifluoromethylphenoxy)‐2‐(3′‐trifluoromethyl‐4′‐chlorophenyl) benzene). From both diamines, two series of PIs with different haloid pendants were prepared via two‐step chemical imidization methods with various dianhydride compounds. All the PIs have the high Tg, excellent thermal stability and good solubility, and can be formed the transparent, strong, and flexible films. All the PIs also are good transparent in UV‐evisible absorption spectra, and have the low birefringences (0.0128–0.0157 at 650 nm) and low optical loss at communication windows. Two series of PIs exhibit the similar optical properties, except for refractive index. Based on the fantastic characterization, a series of optical materials with the tunable refractive indices were obtained by copolymerization. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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“…region. [17][18][19] The effect of the fluorinated and chlorinated moieties on the optical loss was evaluated by the near-IR spectrum of the polymer films. As shown in Figure 4, the polymer films showed small light absorption at the 1.3 and 1.55 mm wavelengths.…”

Section: Optical Properties and Dielectric Constantsmentioning

confidence: 99%

“…Fluorinated poly(arylene ether)s developed as low dielectric constant materials are good candidates for waveguide materials due to their outstanding properties. [16][17][18][19] We are interested in the synthesis of aromatic polymers with fluorinated bulky pendant groups. [20,21] In this study, we present the synthesis of a chloro-fluorinated bisphenol monomer, (4-chloro-3-trifluoromethyl)phenylhydroquinone.…”

Section: Introductionmentioning

confidence: 96%

Aromatic Polyethers with a 4‐Chloro‐3‐trifluoromethylphenyl Group

Liu

Jin

et al. 2004

Macro Chemistry & Physics

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Summary: A novel bisphenol, (4‐chloro‐3‐trifluoromethyl)phenylhydroquinone (3FC‐PH), was synthesized via a three‐step synthetic procedure. Four aromatic polyethers based on 3FC‐PH were prepared via a nucleophilic aromatic substitution polycondensation. These polymers had a high thermal stability, and the temperatures at a 5% weight loss were above 516 °C in air. The solubility of the polyethers was improved by the introduction of bulky pendant groups. The average refractive indices of the polymer films at 1 320 nm were in the range 1.5381–1.6145. The dielectric constants of the polyether films estimated from the refractive indices were 2.69–2.98. Highly fluorinated 3FC‐PAE exhibited lower light absorption in the near‐IR region.

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Synthesis and properties of chlorinated polyimides

Cited by 25 publications

References 0 publications

Characterization of amorphous hydrogenated chlorinated plasma polymers

Characterization of amorphous hydrogenated chlorinated plasma polymers

Synthesis and properties of novel polyimide optical materials with different haloid pendant

Aromatic Polyethers with a 4‐Chloro‐3‐trifluoromethylphenyl Group

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