Microhardness of quenched and annealed isotactic polypropylene
The influence of molecular weight on the microhardness of quenched and subsequently annealed isotactic PP is shown. A clear dependence of microhardness on molecular weight and annealing temperature was detected. Even in the quenched state, where it was difficult to detect morphological differences b...
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| Veröffentlicht in: | Journal of materials science 2007-07, Vol.42 (14), p.5318-5326 |
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| container_title | Journal of materials science |
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| creator | KOCH, Thomas SEIDLER, Sabine HALWAX, Erich BERNSTORFF, Sigrid |
| description | The influence of molecular weight on the microhardness of quenched and subsequently annealed isotactic PP is shown. A clear dependence of microhardness on molecular weight and annealing temperature was detected. Even in the quenched state, where it was difficult to detect morphological differences between the materials, microhardness shows differences. In all states, quenched and annealed, the lower molecular weight samples have the higher hardness values. Up to an annealing temperature of 70 °C the hardness increases only slightly in all samples, above 80 °C a more pronounced increase was observed. For the microhardness of the samples annealed at 140 °C the ratio of the amorphous to the crystalline length is the dominating morphological parameter. |
| doi_str_mv | 10.1007/s10853-006-0960-4 |
| format | Article |
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A clear dependence of microhardness on molecular weight and annealing temperature was detected. Even in the quenched state, where it was difficult to detect morphological differences between the materials, microhardness shows differences. In all states, quenched and annealed, the lower molecular weight samples have the higher hardness values. Up to an annealing temperature of 70 °C the hardness increases only slightly in all samples, above 80 °C a more pronounced increase was observed. For the microhardness of the samples annealed at 140 °C the ratio of the amorphous to the crystalline length is the dominating morphological parameter.</description><identifier>ISSN: 0022-2461</identifier><identifier>EISSN: 1573-4803</identifier><identifier>DOI: 10.1007/s10853-006-0960-4</identifier><identifier>CODEN: JMTSAS</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Annealing ; Applied sciences ; Crystal structure ; Dependence ; Exact sciences and technology ; Hardness ; Isotactic ; Isotacticity ; Materials science ; Mechanical properties ; Microhardness ; Molecular weight ; Morphology ; Organic polymers ; Physicochemistry of polymers ; Polypropylenes ; Properties and characterization ; Quenching ; Quenching (cooling)</subject><ispartof>Journal of materials science, 2007-07, Vol.42 (14), p.5318-5326</ispartof><rights>2007 INIST-CNRS</rights><rights>Journal of Materials Science is a copyright of Springer, (2007). 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A clear dependence of microhardness on molecular weight and annealing temperature was detected. Even in the quenched state, where it was difficult to detect morphological differences between the materials, microhardness shows differences. In all states, quenched and annealed, the lower molecular weight samples have the higher hardness values. Up to an annealing temperature of 70 °C the hardness increases only slightly in all samples, above 80 °C a more pronounced increase was observed. For the microhardness of the samples annealed at 140 °C the ratio of the amorphous to the crystalline length is the dominating morphological parameter.</description><subject>Annealing</subject><subject>Applied sciences</subject><subject>Crystal structure</subject><subject>Dependence</subject><subject>Exact sciences and technology</subject><subject>Hardness</subject><subject>Isotactic</subject><subject>Isotacticity</subject><subject>Materials science</subject><subject>Mechanical properties</subject><subject>Microhardness</subject><subject>Molecular weight</subject><subject>Morphology</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>Polypropylenes</subject><subject>Properties and characterization</subject><subject>Quenching</subject><subject>Quenching (cooling)</subject><issn>0022-2461</issn><issn>1573-4803</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp9kMtKAzEUhoMoWC8P4G5AFDfRc04mt40gxRtU3Og6xEyGTpnOjJN20bc3pQXBhYsQAt_585-PsQuEWwTQdwnBSMEBFAergJcHbIJSC14aEIdsAkDEqVR4zE5SWgCA1IQTdv_WhLGf-7HqYkpFXxff69iFeawK321PF32bH03qVz6smlAMfbsZxn7YtLGLZ-yo9m2K5_v7lH0-PX5MX_js_fl1-jDjQSi94oQxfEFA8qGWpdI1ACqDOoigItpAuY4irUqlSGBltSkrGaisg6gIpRSn7HqXm3_OBdPKLZsUYtv6Lvbr5MhaIwyZDN78C2ZNhMaiwoxe_kEX_Xrs8hqOSFqNuQxlCndU1pTSGGs3jM3Sj5sc5bbq3U69y-rdVr0r88zVPtmn4Nt69F1o0u-gsWSUMuIHAmqBMg</recordid><startdate>20070701</startdate><enddate>20070701</enddate><creator>KOCH, Thomas</creator><creator>SEIDLER, Sabine</creator><creator>HALWAX, Erich</creator><creator>BERNSTORFF, Sigrid</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20070701</creationdate><title>Microhardness of quenched and annealed isotactic polypropylene</title><author>KOCH, Thomas ; SEIDLER, Sabine ; HALWAX, Erich ; BERNSTORFF, Sigrid</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-21ecb0c12acf5467f0016817c3c6e19c20056276466231d9784d5c24fc3d21553</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Annealing</topic><topic>Applied sciences</topic><topic>Crystal structure</topic><topic>Dependence</topic><topic>Exact sciences and technology</topic><topic>Hardness</topic><topic>Isotactic</topic><topic>Isotacticity</topic><topic>Materials science</topic><topic>Mechanical properties</topic><topic>Microhardness</topic><topic>Molecular weight</topic><topic>Morphology</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><topic>Polypropylenes</topic><topic>Properties and characterization</topic><topic>Quenching</topic><topic>Quenching (cooling)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KOCH, Thomas</creatorcontrib><creatorcontrib>SEIDLER, Sabine</creatorcontrib><creatorcontrib>HALWAX, Erich</creatorcontrib><creatorcontrib>BERNSTORFF, Sigrid</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</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 Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</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>Engineering Collection</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KOCH, Thomas</au><au>SEIDLER, Sabine</au><au>HALWAX, Erich</au><au>BERNSTORFF, Sigrid</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microhardness of quenched and annealed isotactic polypropylene</atitle><jtitle>Journal of materials science</jtitle><date>2007-07-01</date><risdate>2007</risdate><volume>42</volume><issue>14</issue><spage>5318</spage><epage>5326</epage><pages>5318-5326</pages><issn>0022-2461</issn><eissn>1573-4803</eissn><coden>JMTSAS</coden><abstract>The influence of molecular weight on the microhardness of quenched and subsequently annealed isotactic PP is shown. A clear dependence of microhardness on molecular weight and annealing temperature was detected. Even in the quenched state, where it was difficult to detect morphological differences between the materials, microhardness shows differences. In all states, quenched and annealed, the lower molecular weight samples have the higher hardness values. Up to an annealing temperature of 70 °C the hardness increases only slightly in all samples, above 80 °C a more pronounced increase was observed. For the microhardness of the samples annealed at 140 °C the ratio of the amorphous to the crystalline length is the dominating morphological parameter.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1007/s10853-006-0960-4</doi><tpages>9</tpages></addata></record> |
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| subjects | Annealing Applied sciences Crystal structure Dependence Exact sciences and technology Hardness Isotactic Isotacticity Materials science Mechanical properties Microhardness Molecular weight Morphology Organic polymers Physicochemistry of polymers Polypropylenes Properties and characterization Quenching Quenching (cooling) |
| title | Microhardness of quenched and annealed isotactic polypropylene |
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