Rheological Study Bringing New Insights into PET/PC Reactive Blends

Extruded poly(ethylene terephthalate)/polycarbonate (PET/PC) blends, with/without cobalt catalyst and at different polymer ratios, were prepared. Rheological behaviour was discussed in terms of storage (G′) and loss (G″) moduli, loss tangent (Tan δ) and viscosity (η). Both G′ and G″ increased as a f...

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Veröffentlicht in:	Macromolecular symposia. 2010-04, Vol.290 (1), p.121-131
Hauptverfasser:	Pereira, Patrícia S.C, Mendes, Luis C, Ramos, Valéria D
Format:	Artikel
Sprache:	eng
Schlagworte:	Blends catalyst Catalysts Inverse PET/PC Polycarbonates Polyethylene terephthalates Polymer blends reactive blend Rheological properties rheology Viscosity
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creator	Pereira, Patrícia S.C Mendes, Luis C Ramos, Valéria D
description	Extruded poly(ethylene terephthalate)/polycarbonate (PET/PC) blends, with/without cobalt catalyst and at different polymer ratios, were prepared. Rheological behaviour was discussed in terms of storage (G′) and loss (G″) moduli, loss tangent (Tan δ) and viscosity (η). Both G′ and G″ increased as a function of frequency for all blends. PET was the matrix in the blends with 80 and 50 wt% of polyester but in the PC rich-blend an inversion was observed. In all cases, lower Tan δ values were achieved at high frequencies. The viscosity behaviour showed a catalyst dependency. PET dictated the rheological properties of the blends without catalyst whereas PC governed blends with catalyst. Alcoholysis and acidolysis reactions plus a transesterification reaction occurred on the interface was dependent on the matrix component. These reactions seem to occur at higher extent in blends in which PET is the matrix but the inverse happened in the PC rich-blend.
doi_str_mv	10.1002/masy.201050414
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Rheological behaviour was discussed in terms of storage (G′) and loss (G″) moduli, loss tangent (Tan δ) and viscosity (η). Both G′ and G″ increased as a function of frequency for all blends. PET was the matrix in the blends with 80 and 50 wt% of polyester but in the PC rich-blend an inversion was observed. In all cases, lower Tan δ values were achieved at high frequencies. The viscosity behaviour showed a catalyst dependency. PET dictated the rheological properties of the blends without catalyst whereas PC governed blends with catalyst. Alcoholysis and acidolysis reactions plus a transesterification reaction occurred on the interface was dependent on the matrix component. 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These reactions seem to occur at higher extent in blends in which PET is the matrix but the inverse happened in the PC rich-blend.</description><subject>Blends</subject><subject>catalyst</subject><subject>Catalysts</subject><subject>Inverse</subject><subject>PET/PC</subject><subject>Polycarbonates</subject><subject>Polyethylene terephthalates</subject><subject>Polymer blends</subject><subject>reactive blend</subject><subject>Rheological properties</subject><subject>rheology</subject><subject>Viscosity</subject><issn>1022-1360</issn><issn>1521-3900</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFkEtPwkAUhRujiYhu3dqdq8K9M9N2ugSiiDwkPGJcTYbpAKOlxU4R-feW1BB3Jjc5d_F9Z3Ec5xahgQCkuZH20CCA4ANDdubU0Cfo0QjgvPyBEA9pAJfOlbXvABBFIdaczmStsyRbGSUTd1rs4oPbzk26Ks8d6b3bS61ZrQvrmrTI3PHDrDnuuBMtVWG-tNtOdBrba-diKROrb36z7swfH2adJ2_w0u11WgNPUU6ZxygBEmmOIWjCIGYsRB74RHJFiVJLFiBKKVGSRRxKxZCEXKrY50ovUPGA1p37qnebZ587bQuxMVbpJJGpznZWhD4NOAdCS7JRkSrPrM31Umxzs5H5QSCI41jiOJY4jVUKUSXsTaIP_9Bi2Jq-_XW9yjW20N8nV-YfIghp6IvXUVcMB33af575YlTydxW_lJmQq9xYMZ-WdRSQExr4nP4AIUWE3A</recordid><startdate>201004</startdate><enddate>201004</enddate><creator>Pereira, Patrícia S.C</creator><creator>Mendes, Luis C</creator><creator>Ramos, Valéria D</creator><general>Wiley-VCH Verlag</general><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><scope>FBQ</scope><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>201004</creationdate><title>Rheological Study Bringing New Insights into PET/PC Reactive Blends</title><author>Pereira, Patrícia S.C ; Mendes, Luis C ; Ramos, Valéria D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3834-432029e8170e240d44718652a8c32ccf4611aaa1a2bd7ac41278acd58ceb1c863</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Blends</topic><topic>catalyst</topic><topic>Catalysts</topic><topic>Inverse</topic><topic>PET/PC</topic><topic>Polycarbonates</topic><topic>Polyethylene terephthalates</topic><topic>Polymer blends</topic><topic>reactive blend</topic><topic>Rheological properties</topic><topic>rheology</topic><topic>Viscosity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pereira, Patrícia S.C</creatorcontrib><creatorcontrib>Mendes, Luis C</creatorcontrib><creatorcontrib>Ramos, Valéria D</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Macromolecular symposia.</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pereira, Patrícia S.C</au><au>Mendes, Luis C</au><au>Ramos, Valéria D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rheological Study Bringing New Insights into PET/PC Reactive Blends</atitle><jtitle>Macromolecular symposia.</jtitle><addtitle>Macromol. 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subjects	Blends catalyst Catalysts Inverse PET/PC Polycarbonates Polyethylene terephthalates Polymer blends reactive blend Rheological properties rheology Viscosity
title	Rheological Study Bringing New Insights into PET/PC Reactive Blends
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