Processo de polimerização de alta pressão para preparar polietileno de baixa densidade

trata-se de um polietileno de baixa densidade particularmente adequado para revestimento por extrusão, que tem os seguintes recursos: 1) uma densidade de 0,910 a 0,924 g/cm3, determinada de acordo com iso 1183, em 23°c; 2) endurecimento de alongamento em 150°c, em uma taxa de alongamento de 1 s-1 ig...

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Hauptverfasser: GONIOUKH ANDREI, VITTORIAS IAKOVOS, MANNEBACH GERD, WEIAND SEBASTIAN, LILGE DIETER, KÜPPER GUIDO, BÜRGER GUIDO, HERRMANN THOMAS, FINETTE ANDRE-ARMAND, SCHMITZ STEPHAN
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creator GONIOUKH ANDREI
VITTORIAS IAKOVOS
MANNEBACH GERD
WEIAND SEBASTIAN
LILGE DIETER
KÜPPER GUIDO
BÜRGER GUIDO
HERRMANN THOMAS
FINETTE ANDRE-ARMAND
SCHMITZ STEPHAN
description trata-se de um polietileno de baixa densidade particularmente adequado para revestimento por extrusão, que tem os seguintes recursos: 1) uma densidade de 0,910 a 0,924 g/cm3, determinada de acordo com iso 1183, em 23°c; 2) endurecimento de alongamento em 150°c, em uma taxa de alongamento de 1 s-1 igual ou superior a 4,2; 3) uma razão de mw/mn igual ou superior a 18, em que mw é a massa molar ponderal média, medida pelo detector malls acoplado à gpc, e mn é a massa molar média numérica, medida por gpc (cromatografia de permeação de gel); 4) valores de mw iguais ou superiores a 230.000 g/mol, em que mw é medida conforme dito anteriormente. The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm3, determined according to ISO 1183 at 23° C.; (B) an elongational hardening of at least 4.2, at 150° C. at an elongational rate of 1 s−1; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. The present disclosure further provides a polymerization process occurring (A) in the presence of oxygen as the only radical initiating agent and (B) in the absence of solvents.
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The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm3, determined according to ISO 1183 at 23° C.; (B) an elongational hardening of at least 4.2, at 150° C. at an elongational rate of 1 s−1; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. 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The present disclosure provides a low density polyethylene (LDPE) having (A) a density from 0.910 to 0.924 g/cm3, determined according to ISO 1183 at 23° C.; (B) an elongational hardening of at least 4.2, at 150° C. at an elongational rate of 1 s−1; (C) a ratio Mw/Mn of at least 18, where (i) Mw is the weight average molar mass, measured by a MALLS detector coupled to a GPC, and (ii) Mn is the number average molar mass, measured by GPC (Gel Permeation Chromatography); and (D) a Mw of at least 230,000 g/mol. The present disclosure also provides an article of manufacture made from or containing (A) a substrate and (B) a coating layer made from or containing the disclosed LDPE. The present disclosure further provides a polymerization process occurring (A) in the presence of oxygen as the only radical initiating agent and (B) in the absence of solvents.</abstract><oa>free_for_read</oa></addata></record>
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
LAYERED PRODUCTS
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
title Processo de polimerização de alta pressão para preparar polietileno de baixa densidade
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