Publicação
Mechanical performance of double gated injected metallic looking polypropylene parts
| Resumo: | The metallic effect obtained by incorporation of metal particles in polymers by injection molding has the advantage of eliminating post-processing techniques reducing production cost and time. Nevertheless, undesired defects in the final appearance of parts are common. In this work PP/aluminum pigments were obtained by direct injection molding and the influence of metallic particles on the aesthetic, morphological and mechanical properties of the parts was assessed. Aesthetic aspects could be improved by manipulating processing conditions: high melt temperatures diminished differential shrinkage and made weld lines less noticeable. Also at high melt temperatures Al particles increased thermal conductivity of PP generating a thicker skin, which combined with an inherent gradient temperature and typical shear stresses developed during injection molding, induced the formation of beta-PP phase. Mechanical performance of parts showed to be dependent on PP morphology. Distinct deformation behaviors were seen according to the presence of PP polymorph, beta-PP counteracting the detrimental effect of not bonded Al flakes, and making PP-Al moldings to have similar toughness as PP moldings with the added value of metallic looking. |
|---|---|
| Autores principais: | Costantino, M. A. |
| Outros Autores: | Pettarin, V.; Pontes, A. J.; Frontini, P. M. |
| Assunto: | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1867439056889053184 |
|---|---|
| author | Costantino, M. A. |
| author2 | Pettarin, V. Pontes, A. J. Frontini, P. M. |
| author2_role | author author author |
| author_facet | Costantino, M. A. Pettarin, V. Pontes, A. J. Frontini, P. M. |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Costantino, M. A.\"},{\"Person.name\":\"Pettarin, V.\"},{\"Person.name\":\"Pontes, A. J.\"},{\"Person.name\":\"Frontini, P. M.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Costantino, M. A. Pettarin, V. Pontes, A. J. Frontini, P. M. |
| datacite.date.Accepted.fl_str_mv | 2015-11-01T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| datacite.titles.title.fl_str_mv | Mechanical performance of double gated injected metallic looking polypropylene parts |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Costantino, M. A. Pettarin, V. Pontes, A. J. Frontini, P. M. |
| dc.date.Accepted.fl_str_mv | 2015-11-01T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/53073 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Budapest University of Technology and Economics. Faculty of Civil Engineering |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| dc.title.fl_str_mv | Mechanical performance of double gated injected metallic looking polypropylene parts |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The metallic effect obtained by incorporation of metal particles in polymers by injection molding has the advantage of eliminating post-processing techniques reducing production cost and time. Nevertheless, undesired defects in the final appearance of parts are common. In this work PP/aluminum pigments were obtained by direct injection molding and the influence of metallic particles on the aesthetic, morphological and mechanical properties of the parts was assessed. Aesthetic aspects could be improved by manipulating processing conditions: high melt temperatures diminished differential shrinkage and made weld lines less noticeable. Also at high melt temperatures Al particles increased thermal conductivity of PP generating a thicker skin, which combined with an inherent gradient temperature and typical shear stresses developed during injection molding, induced the formation of beta-PP phase. Mechanical performance of parts showed to be dependent on PP morphology. Distinct deformation behaviors were seen according to the presence of PP polymorph, beta-PP counteracting the detrimental effect of not bonded Al flakes, and making PP-Al moldings to have similar toughness as PP moldings with the added value of metallic looking. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/44e29164-a78a-4c12-bbef-1ab8aaf05825/download |
| id | rum_fd2acb7c4e18bcb21d7c52dd67b2d5da |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/53073 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/53073 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Costantino, M. A. Pettarin, V. Pontes, A. J. Frontini, P. M. |
| publishDate | 2015 |
| publisher.none.fl_str_mv | Budapest University of Technology and Economics. Faculty of Civil Engineering |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engBudapest University of Technology and Economics. Faculty of Civil EngineeringporThe metallic effect obtained by incorporation of metal particles in polymers by injection molding has the advantage of eliminating post-processing techniques reducing production cost and time. Nevertheless, undesired defects in the final appearance of parts are common. In this work PP/aluminum pigments were obtained by direct injection molding and the influence of metallic particles on the aesthetic, morphological and mechanical properties of the parts was assessed. Aesthetic aspects could be improved by manipulating processing conditions: high melt temperatures diminished differential shrinkage and made weld lines less noticeable. Also at high melt temperatures Al particles increased thermal conductivity of PP generating a thicker skin, which combined with an inherent gradient temperature and typical shear stresses developed during injection molding, induced the formation of beta-PP phase. Mechanical performance of parts showed to be dependent on PP morphology. Distinct deformation behaviors were seen according to the presence of PP polymorph, beta-PP counteracting the detrimental effect of not bonded Al flakes, and making PP-Al moldings to have similar toughness as PP moldings with the added value of metallic looking.application/pdfporMechanical performance of double gated injected metallic looking polypropylene partsCostantino, M. A.Pettarin, V.Pontes, A. J.Frontini, P. M.HostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf1788-618XDOIIsPartOf10.3144/expresspolymlett.2015.932015-112018-03-21T06:47:44Z2015-11-01T00:00:00ZHandlehttps://hdl.handle.net/1822/53073http://purl.org/coar/access_right/c_16ecrestricted accessPolymer compositesProcessing technologiesMechanical propertiesFractureMorphology-performance relationshipOlymer composites1267124 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://repositorium.uminho.pt/bitstreams/44e29164-a78a-4c12-bbef-1ab8aaf05825/download |
| spellingShingle | Mechanical performance of double gated injected metallic looking polypropylene parts Costantino, M. A. Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| status | SINGLETON |
| subject.fl_str_mv | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| title | Mechanical performance of double gated injected metallic looking polypropylene parts |
| title_full | Mechanical performance of double gated injected metallic looking polypropylene parts |
| title_fullStr | Mechanical performance of double gated injected metallic looking polypropylene parts |
| title_full_unstemmed | Mechanical performance of double gated injected metallic looking polypropylene parts |
| title_short | Mechanical performance of double gated injected metallic looking polypropylene parts |
| title_sort | Mechanical performance of double gated injected metallic looking polypropylene parts |
| topic | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| topic_facet | Polymer composites Processing technologies Mechanical properties Fracture Morphology-performance relationship Olymer composites |
| url | https://hdl.handle.net/1822/53073 |
| visible | 1 |