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Computer Applications in Applied Polymer Science II. by Theodore Provder PDF

By Theodore Provder

Addresses the impression of machine technology on automation, modeling, simulation, and optimization of polymer technological know-how a result of availability of extra robust, lower-cost pcs and modeling software program. 5 sections illustrate a large choice of modeling purposes, together with laboratory and knowledge automation; mathematical modeling, simulation, and optimization; cross-linking reactions and medication approach modeling; polymerization kinetics and strategy modeling; and polymerization strategy keep watch over.

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We have developed a f u l l y automated instrument for performing these t e s t s on rigid m a t e r i a l s of an Instron u n i v e r s a laboratory robot, a D i g i t a l Equipment Corporation minicomputer, and custom-made accessories to manipulate the specimens and measure t h e i r dimensions a u t o m a t i c a l l y . Our system allows us to determine the t e n s i l e or f l e x u r a l properties of over one hundred specimens without human i n t e r v e n t i o n , and it has s i g n i f i c a n t l y improved the p r o d u c t i v i t y of our laboratory.

Depending upon a specimen's chemical composition and physical form, a test may run for several months and generate large amounts of data that must be collected and evaluated. When run manually, immersion t e s t i n g i s tedious and time consuming. Weight measurements are limited to an eight hour work schedule and are subject to human e r r o r s . A l s o , manpower constraints l i m i t the number of samples and the variety of conditions under which materials can be t e s t e d . When water i s used as the immersion l i q u i d , the t e s t i s essent i a l l y the ASTM Standard Test Method (D570) for Water Absorption of P l a s t i e s .

Custom-designed holders are used to change gripper positions on specimens during the b l o t t i n g procedure and to support specimens on the balance pan during weighing. The balance has a pneumatically activated door on top which opens for specimen t r a n s f e r and remains closed during weighing. 0001 g. O v e r a l l c o n t r o l of the system i s d i r e c t e d by an IBM PC/AT computer using the DOS operating system and a menu-driven program. The program i s w r i t t e n i n BASIC with simple AI r o u t i n e s (quasi production rule based expert systems) to provide maximum f l e x i b i l i t y for the t e s t i n g procedure and real-time control (decision making) i n running t e s t s .

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