Conventional and Microcellular Injection Molding of a Highly Filled Polycarbonate Composite with Glass Fibers and Carbon Black
Conventional solid injection molding (CIM) and microcellular injection molding (MIM) of a highly filled polycarbonate (PC) composite with glass fibers and carbon black were performed for molding ASTM tensile test bars and a box-shape part with variable wall thickness. A scanning electron microscope...
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| Veröffentlicht in: | Polymers 2022-03, Vol.14 (6), p.1193 |
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| creator | Yilmaz, Galip Devahastin, Apichart Turng, Lih-Sheng |
| description | Conventional solid injection molding (CIM) and microcellular injection molding (MIM) of a highly filled polycarbonate (PC) composite with glass fibers and carbon black were performed for molding ASTM tensile test bars and a box-shape part with variable wall thickness. A scanning electron microscope (SEM) was used to examine the microstructure at the fractured surface of the tensile test bar samples. The fine and uniform cellular structure suggests that the PC composite is a suitable material for foaming applications. Standard tensile tests showed that, while the ultimate strength and elongation at break were lower for the foamed test bars at 4.0-11.4% weight reduction, their specific Young's modulus was comparable to that of their solid counterparts. A melt flow and transition model was proposed to explain the unique, irregular "tiger-stripes" exhibited on the surface of solid test bars. Increasing the supercritical fluid (SCF) dosage and weight reduction of foamed samples resulted in swirl marks on the part surface, making the tiger-stripes less noticeable. Finally, it was found that an injection pressure reduction of 25.8% could be achieved with MIM for molding a complex box-shaped part in a consistent and reliable fashion. |
| doi_str_mv | 10.3390/polym14061193 |
| format | Article |
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A scanning electron microscope (SEM) was used to examine the microstructure at the fractured surface of the tensile test bar samples. The fine and uniform cellular structure suggests that the PC composite is a suitable material for foaming applications. Standard tensile tests showed that, while the ultimate strength and elongation at break were lower for the foamed test bars at 4.0-11.4% weight reduction, their specific Young's modulus was comparable to that of their solid counterparts. A melt flow and transition model was proposed to explain the unique, irregular "tiger-stripes" exhibited on the surface of solid test bars. Increasing the supercritical fluid (SCF) dosage and weight reduction of foamed samples resulted in swirl marks on the part surface, making the tiger-stripes less noticeable. Finally, it was found that an injection pressure reduction of 25.8% could be achieved with MIM for molding a complex box-shaped part in a consistent and reliable fashion.</description><identifier>ISSN: 2073-4360</identifier><identifier>EISSN: 2073-4360</identifier><identifier>DOI: 10.3390/polym14061193</identifier><identifier>PMID: 35335523</identifier><language>eng</language><publisher>Switzerland: MDPI AG</publisher><subject>Bars ; Carbon black ; Cell growth ; Cellular structure ; Cost estimates ; Electrostatic discharges ; Elongation ; Glass fiber reinforced plastics ; Injection molding ; Mechanical properties ; Modulus of elasticity ; Morphology ; Nitrogen ; Polycarbonate resins ; Polymers ; Pressure reduction ; Supercritical fluids ; Tensile tests ; Thickness ; Ultimate tensile strength ; Weight reduction</subject><ispartof>Polymers, 2022-03, Vol.14 (6), p.1193</ispartof><rights>2022 by the authors. Licensee MDPI, Basel, Switzerland. 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Finally, it was found that an injection pressure reduction of 25.8% could be achieved with MIM for molding a complex box-shaped part in a consistent and reliable fashion.</description><subject>Bars</subject><subject>Carbon black</subject><subject>Cell growth</subject><subject>Cellular structure</subject><subject>Cost estimates</subject><subject>Electrostatic discharges</subject><subject>Elongation</subject><subject>Glass fiber reinforced plastics</subject><subject>Injection molding</subject><subject>Mechanical properties</subject><subject>Modulus of elasticity</subject><subject>Morphology</subject><subject>Nitrogen</subject><subject>Polycarbonate resins</subject><subject>Polymers</subject><subject>Pressure reduction</subject><subject>Supercritical fluids</subject><subject>Tensile tests</subject><subject>Thickness</subject><subject>Ultimate tensile strength</subject><subject>Weight reduction</subject><issn>2073-4360</issn><issn>2073-4360</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpdkc1v1DAQxS0EolXpkSuyxIVLWn87uSBBRD-kVnCAs-U4k10vTrzYSdFe-NvxbkvV4suMND89z7yH0FtKzjhvyPk2ht1IBVGUNvwFOmZE80pwRV4-6Y_Qac4bUp6QSlH9Gh1xybmUjB-jP22c7mCafZxswHbq8a13KToIYQk24etpA24_xbcx9H5a4Thgi6_8ah12-MKHAD3-VtZwNnVFYwbcxnEbsy_dbz-v8WWwOReyg5QPH7QHEn8O1v18g14NNmQ4fagn6MfFl-_tVXXz9fK6_XRTOUHlXEmmG-m4ZKKhdICa9Uo3GgQD0XCiLB2IVsx2FgQ4IhgljHKpwTaq152S_AR9vNfdLt0IvSsXJxvMNvnRpp2J1pvnk8mvzSrembqRRNd1EfjwIJDirwXybEaf9y7ZCeKSDVNCEMKk0gV9_x-6iUsq9h4oVhJQNS1UdU8Vt3NOMDwuQ4nZh2uehVv4d08veKT_Rcn_AtacoPI</recordid><startdate>20220316</startdate><enddate>20220316</enddate><creator>Yilmaz, Galip</creator><creator>Devahastin, Apichart</creator><creator>Turng, Lih-Sheng</creator><general>MDPI AG</general><general>MDPI</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-8748-456X</orcidid><orcidid>https://orcid.org/0000-0001-8128-3193</orcidid></search><sort><creationdate>20220316</creationdate><title>Conventional and Microcellular Injection Molding of a Highly Filled Polycarbonate Composite with Glass Fibers and Carbon Black</title><author>Yilmaz, Galip ; Devahastin, Apichart ; Turng, Lih-Sheng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c415t-52795c3524911fe82d6797e42e49306a1f0762abae4ec0421021357ea96d7b653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Bars</topic><topic>Carbon black</topic><topic>Cell growth</topic><topic>Cellular structure</topic><topic>Cost estimates</topic><topic>Electrostatic discharges</topic><topic>Elongation</topic><topic>Glass fiber reinforced plastics</topic><topic>Injection molding</topic><topic>Mechanical properties</topic><topic>Modulus of elasticity</topic><topic>Morphology</topic><topic>Nitrogen</topic><topic>Polycarbonate resins</topic><topic>Polymers</topic><topic>Pressure reduction</topic><topic>Supercritical fluids</topic><topic>Tensile tests</topic><topic>Thickness</topic><topic>Ultimate tensile strength</topic><topic>Weight reduction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yilmaz, Galip</creatorcontrib><creatorcontrib>Devahastin, Apichart</creatorcontrib><creatorcontrib>Turng, Lih-Sheng</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Polymers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yilmaz, Galip</au><au>Devahastin, Apichart</au><au>Turng, Lih-Sheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Conventional and Microcellular Injection Molding of a Highly Filled Polycarbonate Composite with Glass Fibers and Carbon Black</atitle><jtitle>Polymers</jtitle><addtitle>Polymers (Basel)</addtitle><date>2022-03-16</date><risdate>2022</risdate><volume>14</volume><issue>6</issue><spage>1193</spage><pages>1193-</pages><issn>2073-4360</issn><eissn>2073-4360</eissn><abstract>Conventional solid injection molding (CIM) and microcellular injection molding (MIM) of a highly filled polycarbonate (PC) composite with glass fibers and carbon black were performed for molding ASTM tensile test bars and a box-shape part with variable wall thickness. 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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; PubMed Central Open Access |
| subjects | Bars Carbon black Cell growth Cellular structure Cost estimates Electrostatic discharges Elongation Glass fiber reinforced plastics Injection molding Mechanical properties Modulus of elasticity Morphology Nitrogen Polycarbonate resins Polymers Pressure reduction Supercritical fluids Tensile tests Thickness Ultimate tensile strength Weight reduction |
| title | Conventional and Microcellular Injection Molding of a Highly Filled Polycarbonate Composite with Glass Fibers and Carbon Black |
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