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Condensation polymer

Condensation polymers are any kind of polymers formed through a condensation reaction—where molecules join together—losing small molecules as byproducts such as water or methanol. Condensation polymers are formed by polycondensation, when the polymer is formed by condensation reactions between species of all degrees of polymerization, or by condensative chain polymerization, when the polymer is formed by sequential addition of monomers to an active site in a chain reaction; the main alternative forms of polymerization are chain polymerization and polyaddition, both of which give addition polymers. Condensation polymerization is a form of step-growth polymerization. Linear polymers are produced from bifunctional monomers, i.e. compounds with two reactive end groups. Common condensation polymers include polyamides and proteins. One important class of condensation polymers are polyamides, they arise from the reaction of an amine. Examples include proteins; when prepared from amino-carboxylic acids, e.g. amino acids, the stoichiometry of the polymerization includes co-formation of water: n H2N-X-CO2H → n + n H2OWhen prepared from diamines and dicarboxylic acids, e.g. the production of nylon 66, the polymerization produces two molecules of water per repeat unit: n H2N-X-NH2 + n HO2C-Y-CO2H → n + 2n H2O One important class of condensation polymers are polyesters.

They arise from the reaction of an alcohol. Examples include polyesters, e.g. polyethyleneterephthalate: n HO-X-OH + n HO2C-Y-CO2H → n + H2O Condensation polymers tend to be more biodegradable than addition polymers. The peptide or ester bonds between monomers can be hydrolysed in the presence of catalysts or bacterial enzymes. Biopolymer Epoxy resins Polyamide Polyester Polymers - Virtual Text of Organic Chemistry, William Reusch

The Rainbow Princess

The Rainbow Princess is a lost American silent film released by the Famous Players Film Company on October 22, 1916. The picture was filmed by cinematographer H. Lyman Broening; the Rainbow Princess was written by Shannon Fife and marked actress Ann Pennington's second appearance on celluloid. The Moving Picture World, 1916 After her successful debut in Susie Snowflake it was decided to star Miss Pennington in a circus story to be called The Rainbow Princess, being staged under the direction of J. Searle Dawley. In this picture Miss Pennington plays a little waif, adopted by the wife of the proprietor of a circus and is forced to do a great deal of the mean work around the place in addition to learning to do tricks with the animals. Of course there is a lover among the men in the troupe but The Princess, realizing that he is not quite sincere in his attentions, has the good sense to refuse to accept his attentions, she proves to be not at all the waif that she was thought to be and—but the story is one to be seen on the screen.

The production of this photoplay at this particular time has caused many unexpected difficulties to be placed in the path of Director Dawley, because of the strict quarantines which have been placed upon itinerant citizens because of the paralysis plague. As a result of these numerous obstacles, Mr. Dawley was forced to arrange with one of the circuses, on Long Island to have it disband and travel back to New York in small units, with the Famous Players studio as their rendezvous; the tent was set up in a large vacant lot on the west side and the scenes were taken. Miss Pennington, a remarkably clever athlete and is a trained acrobat, has done some startling feats in the "show" and she predicts that she will accomplish more before the end of the picture Forest Leaves, 1916 When Ann Pennington was creating a sensation on the stage of the Ziegfeld Follies, the little star decided that she had enough spare time to become a motion picture satellite, constellation or luminary, she accordingly made her debut in Susie Snowflake.

The circus with all the background of billowing canvas, the freaks, the menagerie, the balloon ascent and the parachute drop – all of these and much more, fascinating – form the setting for the Rainbow Princess. Miss Pennington goes into the lion’s cage, performs aerial tricks, does her celebrated Hula Hula Dance and is her captivating self throughout the entire picture. Ann Pennington... Hope William Courtleigh, Jr.... Warren Reynolds Augusta Anderson... Edithe Worthington Grant Stewart... Judge Daingerfield Charles Sutton... Pop Blodgett Harry Lee... Dave, his son Eddie Sturgis... Joe, his son Clifford Grey... George Waters Herbert Rice... Monsieur Paul Queen Pearl... Mademoiselle Fifi Amy Manning... Rose, the fat lady Carl Gordon... Simon, the skeleton Walter D. Nealand... HawkesSource, IMDb.com The AFI Catalog of Feature Films:.. The Rainbow Princess

Shift (game)

Shift is a Flash game series created and developed by Antony Lavelle and published by Armor Games. The game has been ported to several platforms, including iOS and PlayStation Minis; the gameplay revolves around pressing the shift key to flip the room. The games have had critical success with Shift 2 having a score of 87/100 on Metacritic. In Shift, the player is in a room, half black, half white, one of, solid; when the player presses the Shift, the room flips upside down, the opposite color becomes solid. The player tries to get keys and get to doors while avoiding spikes and other objects. Shift makes a few references in some levels to the popular Valve game Portal, with the phrases'the timer is a lie!' and'Now you're thinking with shifting' Shift was released February 1, 2008. It was released for iOS on May 1, 2009. Shift 2 was released April 12, 2008, it was released for iOS on Dec 22, 2010. Shift 3 was released October 27, 2008. Shift 4 was released May 20, 2009. Shift 2 Mini-game Shift: Freedom!, containing several minigames.

Shift Lite is a version of the game released for iOS on May 2, 2009. Shift Extended is a version made by Fishing Cactus for PlayStation Minis on Jan 18, 2011. Shifting World is a game based on the Shift series, developed by Fishing Cactus and was published by Arc System Works in Japan, Aksys Games in North America and Rising Star Games in Europe for the Nintendo 3DS, it was released on April 24, 2012 in North America, April 26, 2012 in Japan and in September 28, 2012 in Europe. Shift DX Shift Quantum The iOS version of Shift was rated 3/4 by Slide to Play, stating "While the iPhone edition of the game has some issues, the mind-bending idea at the core of the experience still captivates."The iOS version of Shift 2 has a score of 87/100 on Metacritic. Slide to Play rated it 4/4, stating "Shift 2 has the most content of any game in the series on any platform, it's a great way to spend a dollar."Shift Extended has a score of 76 on Metacritic. GameSpy: TGIF: This Game Is Free #20 -- SHIFT - Page 1 Dave's Take on Shift 2 - Web Games Feature at IGN Daemon's Take on SHIFT 3 - Web Games Feature at IGN Shift at Armor Games Shift 2 at Armor Games Shift 3 at Armor Games Shift 4 at Armor Games