Trifluoromethyl-substituted polymers

The synthesis of polymers is discussed. It includes: (1) the synthesis of fluorine-containing crosslinked poly(ether ketones); (2) the synthesis and characterization of poly(imide amides) and their N-methylated analogues; (3) the synthesis of fluorine-containing aromatic polyethers; (4) the synthesis of novel fluorine-containing aromatic polysiloxanes; and (5) the conversion of 6F-containing polythioethers to polysulfones. It is hoped that these polymers will find use as low dielectric materials in electronic applications, function as thermal control coatings, or be suitable elastomeric sealants for extreme service conditions

Low dielectric fluorinated poly(phenylene ether ketone) film and coating

The present invention relates to film and coating materials prepared from novel fluorinated poly(phenylene ether ketones). A fluorinated poly(phenylene ether ketone) is prepared by reacting a bisphenol with 1,1,1,3,3,3 hexafluoro-2,2-bis 4-(4-halobenzoyl) phenyl propane (wherein halo is fluoro or chloro), which is a novel monomer formed as the reaction product of halobenzene (wherein halo is fluoro or chloro) and 1,1,1,3,3,3 hexafluoro-2,2-bis (p-chloro formyl phenyl) propane. Especially beneficial results of this invention are that films and coating materials prepared from the novel fluorinated poly(phenylene ether ketone) are essentially optically transparent/colorless and have a lower dielectric constant than otherwise comparable, commercially available poly(phenylene ether ketones). Moreover, unlike the otherwise comparable commercially available materials, the novel fluorinated poly(phenylene ether ketones) of the present invention can be solution cast or sprayed to produce the films and coatings. Furthermore, the long term thermal stability of the polymers of the present invention is superior to that of the commercially available materials

Single-color two-photon spectroscopy of Rydberg states in electric fields

Rydberg states of atomic helium with principal quantum numbers ranging from n=20 to n=100 have been prepared by non-resonance-enhanced single-color two-photon excitation from the metastable 2 {^3}S{_1} state. Photoexcitation was carried out using linearly and circularly polarized pulsed laser radiation. In the case of excitation with circularly polarized radiation, Rydberg states with azimuthal quantum number |m_{\ell}|=2 were prepared in zero electric field, and in homogeneous electric fields oriented parallel to the propagation axis of the laser radiation. In sufficiently strong electric fields, individual Rydberg-Stark states were resolved spectroscopically, highlighting the suitability of non-resonance-enhanced multiphoton excitation schemes for the preparation of long-lived high-|m_{\ell}| hydrogenic Rydberg states for deceleration and trapping experiments. Applications of similar schemes for Doppler-free excitation of positronium atoms to Rydberg states are also discussed

Passive Spectacles and Resilient Heroines: Examining the Female Gaze in Cinematic Adaptations of The Scarlet Letter, The Last of the Mohicans, and Little Women

In her 1975 article, Visual Pleasure and Narrative Cinema, Laura Mulvey writes, Unchallenged, mainstream film coded the erotic into the language of the dominant patriarchal order (60). She argues that in film, this patriarchal language produces images of women who are displayed for the erotic enjoyment of male spectators, playing out male subconscious erotic fantasies on screen. Using Mulvey\u27s articles as a theoretical framework, I look for evidence of the active female gaze in the cinematic adaptations of 1he Scarlet Letter written by Nathaniel Hawthorne in 1850, The Last of the Mohicans written by James Fenimore Cooper in 1826 and Little Women written by Louisa May Alcott in 1868. For each chapter of my thesis, I examine a pair of adaptations beginning with the 1934 and 1995 versions of the Scarlet Letter, followed by the 1936 and 1992 versions of The Last of the Mohicans, and concluding with the 1933 and 1994 versions of Little Women. Each of the earlier films from the 1930s is encoded in this patriarchal structure to some degree. Mulvey\u27s essay Visual Pleasure and Narrative Cinema was published in 1975. While her theories on patriarchal encryption can be seen in the films from the 1930s, advances in areas such as equal rights, political correctness, and affirmative action have influenced the filmmakers of the later 1990s films. Due to the changes in the political atmosphere, each of the three films from the 1990s demonstrate a greater awareness of the female audience and struggle to allow women to have a strong gaze

Alien Registration- Cassidy, Joseph E. (Brownville, Piscataquis County)

https://digitalmaine.com/alien_docs/10028/thumbnail.jp