Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/666 |
Resumo: | The main objective of this study was to develop and characterize polypropylene modified with flame retardant fillers. Two flame retardant fillers (Aluminum Hydroxide and Magnesium Hydroxide) were incorporated into four distinct types of polypropylene, two of which were homopolymers and two copolymers. The contents of the flame retardant fillers were 40 and 60%, in mass. The composites were prepared using two co-rotating double screw extruders, one a bench scale device and the other of considerably larger dimensions. The test specimens were then injection processed, after which the composites thermal, mechanical, thermomechanical and flammability performance were evaluated. An analysis was made of the thermogravimetric results to identify the possible occurrence of water loss during the composite s processing. The flame retardant fillers were found to improve the composite s flammability behavior, albeit with a concomitant decrease in their mechanical properties, most notably a drop in the material s impact strength. The best physical and mechanical properties and the lowest flammability were obtained with polymer-flame retardant filler composites whose polymeric matrix was composed of propylene-ethylene copolymer with the highest ethylene content. A study was also made of the properties of polypropylene and organic clay nanocomposites, from which a type of polypropylene most closely resembling the ones previously studied was chosen to serve as a standard against which to compare the properties obtained for the polypropylenes modified with traditional flame retardant fillers. Under the conditions utilized in this study, the nanocomposites displayed an adequate physical and mechanical behavior, but the evaluations revealed that no satisfactory increase in resistance to flammability was achieved. |
id |
SCAR_d8d725505d1571351fedba46c7f55af8 |
---|---|
oai_identifier_str |
oai:repositorio.ufscar.br:ufscar/666 |
network_acronym_str |
SCAR |
network_name_str |
Repositório Institucional da UFSCAR |
repository_id_str |
4322 |
spelling |
Trombini, Rejane CristinaAgnelli, José Augusto Marcondeshttp://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4727641E34af79b72-e5a5-42b5-be52-757a7d1213022016-06-02T19:10:02Z2004-12-042016-06-02T19:10:02Z2004-09-03TROMBINI, Rejane Cristina. Development and characteriztion of PP/flame retardant filler compositions.. 2004. 233 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004.https://repositorio.ufscar.br/handle/ufscar/666The main objective of this study was to develop and characterize polypropylene modified with flame retardant fillers. Two flame retardant fillers (Aluminum Hydroxide and Magnesium Hydroxide) were incorporated into four distinct types of polypropylene, two of which were homopolymers and two copolymers. The contents of the flame retardant fillers were 40 and 60%, in mass. The composites were prepared using two co-rotating double screw extruders, one a bench scale device and the other of considerably larger dimensions. The test specimens were then injection processed, after which the composites thermal, mechanical, thermomechanical and flammability performance were evaluated. An analysis was made of the thermogravimetric results to identify the possible occurrence of water loss during the composite s processing. The flame retardant fillers were found to improve the composite s flammability behavior, albeit with a concomitant decrease in their mechanical properties, most notably a drop in the material s impact strength. The best physical and mechanical properties and the lowest flammability were obtained with polymer-flame retardant filler composites whose polymeric matrix was composed of propylene-ethylene copolymer with the highest ethylene content. A study was also made of the properties of polypropylene and organic clay nanocomposites, from which a type of polypropylene most closely resembling the ones previously studied was chosen to serve as a standard against which to compare the properties obtained for the polypropylenes modified with traditional flame retardant fillers. Under the conditions utilized in this study, the nanocomposites displayed an adequate physical and mechanical behavior, but the evaluations revealed that no satisfactory increase in resistance to flammability was achieved.Os principais objetivos deste estudo foram desenvolver e caracterizar composições de polipropileno modificado com cargas retardantes de chama. Duas cargas retardantes de chama (Hidróxido de Alumínio e Hidróxido de Magnésio) foram incorporadas a quatro tipos de polipropileno, sendo dois homopolímeros e dois copolímeros. Os teores das cargas retardantes de chama foram 40 e 60%, em massa. A preparação dos compostos foi realizada utilizando-se duas extrusoras rosca dupla, co-rotacionais, sendo uma de bancada e outra com dimensões superiores. Em seguida houve o processamento dos corpos-de-prova por injeção. Os compostos desenvolvidos foram avaliados com relação aos desempenhos térmico, mecânico, termomecânico e de inflamabilidade. Através dos resultados de termogravimetria verificou-se a ocorrência ou não de perda de água dos compostos, durante o processamento. Verificou-se também que houve um melhor comportamento de inflamabilidade, porém houve redução na maioria das propriedades mecânicas, com maior decréscimo na resistência ao impacto com o aumento da concentração de retardantes de chama. A matriz polimérica formada pelo copolímero propileno-etileno, com maior teor de etileno, permitiu a obtenção de compostos polímero - carga retardante de chama com melhores propriedades físico-mecânicas e menor inflamabilidade. Houve também o estudo das propriedades dos nanocompósitos de polipropileno e argila orgânica, no qual, um tipo de polipropileno mais relacionado aos tipos de polipropileno utilizados na preparação dos compostos com retardantes de chama, foi escolhido visando comparar as propriedades obtidas em relação aos polipropilenos modificados com as cargas retardantes de chama tradicionais. Nas condições empregadas no trabalho, os nanocompósitos mostraram um adequado comportamento físicomecânico, mas não houve um incremento satisfatório nas avaliações de inflamabilidade.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRPolipropilenoCargas retardantes de chamaHidróxido de alumínioHidróxido de magnésioENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICADesenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama.Development and characteriztion of PP/flame retardant filler compositions.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-1-1007567da-759c-46ab-a037-bd8640627838info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALTeseRCT.pdfapplication/pdf6917659https://repositorio.ufscar.br/bitstream/ufscar/666/1/TeseRCT.pdf12987f2c064bfa01b982083b5a05adcdMD51THUMBNAILTeseRCT.pdf.jpgTeseRCT.pdf.jpgIM Thumbnailimage/jpeg6156https://repositorio.ufscar.br/bitstream/ufscar/666/2/TeseRCT.pdf.jpg19e5a6a1772e6266fe3b27af45995d52MD52ufscar/6662023-09-18 18:30:39.884oai:repositorio.ufscar.br:ufscar/666Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:39Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
dc.title.alternative.eng.fl_str_mv |
Development and characteriztion of PP/flame retardant filler compositions. |
title |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
spellingShingle |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. Trombini, Rejane Cristina Polipropileno Cargas retardantes de chama Hidróxido de alumínio Hidróxido de magnésio ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
title_full |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
title_fullStr |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
title_full_unstemmed |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
title_sort |
Desenvolvimento e caracterização de composições polipropileno/cargas retardantes de chama. |
author |
Trombini, Rejane Cristina |
author_facet |
Trombini, Rejane Cristina |
author_role |
author |
dc.contributor.author.fl_str_mv |
Trombini, Rejane Cristina |
dc.contributor.advisor1.fl_str_mv |
Agnelli, José Augusto Marcondes |
dc.contributor.advisor1Lattes.fl_str_mv |
http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4727641E3 |
dc.contributor.authorID.fl_str_mv |
4af79b72-e5a5-42b5-be52-757a7d121302 |
contributor_str_mv |
Agnelli, José Augusto Marcondes |
dc.subject.por.fl_str_mv |
Polipropileno Cargas retardantes de chama Hidróxido de alumínio Hidróxido de magnésio |
topic |
Polipropileno Cargas retardantes de chama Hidróxido de alumínio Hidróxido de magnésio ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
The main objective of this study was to develop and characterize polypropylene modified with flame retardant fillers. Two flame retardant fillers (Aluminum Hydroxide and Magnesium Hydroxide) were incorporated into four distinct types of polypropylene, two of which were homopolymers and two copolymers. The contents of the flame retardant fillers were 40 and 60%, in mass. The composites were prepared using two co-rotating double screw extruders, one a bench scale device and the other of considerably larger dimensions. The test specimens were then injection processed, after which the composites thermal, mechanical, thermomechanical and flammability performance were evaluated. An analysis was made of the thermogravimetric results to identify the possible occurrence of water loss during the composite s processing. The flame retardant fillers were found to improve the composite s flammability behavior, albeit with a concomitant decrease in their mechanical properties, most notably a drop in the material s impact strength. The best physical and mechanical properties and the lowest flammability were obtained with polymer-flame retardant filler composites whose polymeric matrix was composed of propylene-ethylene copolymer with the highest ethylene content. A study was also made of the properties of polypropylene and organic clay nanocomposites, from which a type of polypropylene most closely resembling the ones previously studied was chosen to serve as a standard against which to compare the properties obtained for the polypropylenes modified with traditional flame retardant fillers. Under the conditions utilized in this study, the nanocomposites displayed an adequate physical and mechanical behavior, but the evaluations revealed that no satisfactory increase in resistance to flammability was achieved. |
publishDate |
2004 |
dc.date.available.fl_str_mv |
2004-12-04 2016-06-02T19:10:02Z |
dc.date.issued.fl_str_mv |
2004-09-03 |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:10:02Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
TROMBINI, Rejane Cristina. Development and characteriztion of PP/flame retardant filler compositions.. 2004. 233 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/666 |
identifier_str_mv |
TROMBINI, Rejane Cristina. Development and characteriztion of PP/flame retardant filler compositions.. 2004. 233 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2004. |
url |
https://repositorio.ufscar.br/handle/ufscar/666 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.confidence.fl_str_mv |
-1 -1 |
dc.relation.authority.fl_str_mv |
007567da-759c-46ab-a037-bd8640627838 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
dc.publisher.initials.fl_str_mv |
UFSCar |
dc.publisher.country.fl_str_mv |
BR |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
UFSCAR |
institution |
UFSCAR |
reponame_str |
Repositório Institucional da UFSCAR |
collection |
Repositório Institucional da UFSCAR |
bitstream.url.fl_str_mv |
https://repositorio.ufscar.br/bitstream/ufscar/666/1/TeseRCT.pdf https://repositorio.ufscar.br/bitstream/ufscar/666/2/TeseRCT.pdf.jpg |
bitstream.checksum.fl_str_mv |
12987f2c064bfa01b982083b5a05adcd 19e5a6a1772e6266fe3b27af45995d52 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
|
_version_ |
1802136246342909952 |