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poliésteres

poliésteres. POLIVINIL ESTERES Poliacetato, Polipropionato, etc. - CH 2 - CH -. Metilo: acetato Etilo: propionato Propilo: butirato. R. =. El más empleado es el acetato, en copolímeros con etileno, EVA. O - C - R. O. POLIACRILATOS. POLIMETACRILATOS. - CH 2 - CH -. -. CH3

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poliésteres

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  1. poliésteres POLIVINIL ESTERES Poliacetato, Polipropionato, etc. - CH2 - CH - Metilo: acetato Etilo: propionato Propilo: butirato R = El más empleado es el acetato, en copolímeros con etileno, EVA O - C - R O POLIACRILATOS POLIMETACRILATOS - CH2 - CH - - CH3 n-alquil fenil 2-hidroxi- etil C H3 CH3 n-alquil - R R - CH2 - C - - C = O C = O - - O - R O - R

  2. GRUPO ESTER CADENA 1.Derivados ácidos dicarboxílicos HOOC-R-COOH Etilo: succinato Butilo: adipato R Aplicaciones plastificantes y extendedores cadena PU 2.Derivados ácidos hidroxi-carboxílicos HO-R-COOH Metilo: glicólico CH-CH3: láctico R Aplicaciones biomédicas: hilos sutura 3. Derivados lactonas: e caprolactona -O-(CH2)5-C- = O

  3. 4. Esteres aromáticos PET HO-(CH2)2-OH COOH HOOC + PBT HO-(CH2)4-OH a. tereftálico Incorporación isoftálico Reduce cristalinidad COOH a. isoftálico O HOOC = Cl-C-Cl HO OH + fosgeno O = O - C - O policarbonato

  4. POLIESTERES

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