Plásticos : Introducción a su tecnología /

Detalles Bibliográficos
Autor Principal:	Richarson, Henry M.
Otros autores o Colaboradores:	Watson, J. Wilson
Formato:	Libro
Lengua:	español
Datos de publicación:	Madrid : Aguilar, 1949.
Temas:	PLASTICOS
Resumen:	1- Estructura química de las resinas sintéticas.- 2- Materiales de construcción basados en las resinas sinteticas. 3- Moldeo y fabricación de objetos a partir de materiales plásticos. 4- Propiedades y aplicaciones de los plásticos. 5- Resinas termoestables por condensación. 6- Derivados termoplásticos de la celulosa. 7- Productos termoplásticos por polimerización. 8- El caucho y los elastómeros sintéticos. 9- Poliésteres y poliamidas. 10- Polímeros de adición con enlaces transversales. 11- Resinas de siliconas, cauchos y otros productos derivados. 12- Diseño de los objetos fabricados con materiales plásticos. 13- Moldes para materiales plásticos. 14- Adhesivos y agregados laminares. 15- Moldeo por compresión e inyección o molde caliente. 16- Moldeo por inyección y expulsión. 17- Métodos de ensayo. 18- Control de la calidad y uniformidad.
Descripción Física:	xxvii, 596 p. : il. ; 22 cm.

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return true; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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Plásticos : Introducción a su tecnología /

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