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Gas permeation resistance of various grades of perfluoroalkoxy-polytetrafluoroethylene copolymers
The permeation resistance of various grades of perfluoroalkoxy (PFA)/polytetrafluoroethylene (PTFE) copolymers was tested. Specimens were compression molded using two different cooling techniques: a faster one (ice water quench) and a slower one (press cooled). Permeability, diffusion, and solubilit...
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Published in: | Journal of applied polymer science 2009-01, Vol.111 (1), p.141-147 |
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creator | Monson, L Moon, Sung In Extrand, C.W |
description | The permeation resistance of various grades of perfluoroalkoxy (PFA)/polytetrafluoroethylene (PTFE) copolymers was tested. Specimens were compression molded using two different cooling techniques: a faster one (ice water quench) and a slower one (press cooled). Permeability, diffusion, and solubility coefficients were measured for hydrogen, nitrogen, and oxygen gases. The slow cooled samples always showed much better permeation resistance than those cooled quickly, demonstrating that process can be as important as polymer grade in determining the ultimate permeation resistance of PFA. For a given cooling method, molecular mass (chain length) had no appreciable affect on the permeation resistance. On the other hand, PFA grades with increased comonomer content appeared to have slightly diminished permeation resistance whereas grades with PTFE filler had better permeation resistance. Differences in permeation resistance were attributed to variation in crystallinity arising from differences in molecular architecture and processing. |
doi_str_mv | 10.1002/app.28858 |
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Specimens were compression molded using two different cooling techniques: a faster one (ice water quench) and a slower one (press cooled). Permeability, diffusion, and solubility coefficients were measured for hydrogen, nitrogen, and oxygen gases. The slow cooled samples always showed much better permeation resistance than those cooled quickly, demonstrating that process can be as important as polymer grade in determining the ultimate permeation resistance of PFA. For a given cooling method, molecular mass (chain length) had no appreciable affect on the permeation resistance. On the other hand, PFA grades with increased comonomer content appeared to have slightly diminished permeation resistance whereas grades with PTFE filler had better permeation resistance. Differences in permeation resistance were attributed to variation in crystallinity arising from differences in molecular architecture and processing.</description><identifier>ISSN: 0021-8995</identifier><identifier>EISSN: 1097-4628</identifier><identifier>DOI: 10.1002/app.28858</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>diffusion ; fluoropolymers ; perfluoroalkoxy (PFA) ; polytetrafluoroethylene (PTFE) copolymer ; structure-property relations</subject><ispartof>Journal of applied polymer science, 2009-01, Vol.111 (1), p.141-147</ispartof><rights>Copyright © 2008 Wiley Periodicals, Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4288-d30dd5c04e53e1076b3dd34b41b3ec39db186071abbf8c20a6cf912fd2e7620c3</citedby><cites>FETCH-LOGICAL-c4288-d30dd5c04e53e1076b3dd34b41b3ec39db186071abbf8c20a6cf912fd2e7620c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Monson, L</creatorcontrib><creatorcontrib>Moon, Sung In</creatorcontrib><creatorcontrib>Extrand, C.W</creatorcontrib><title>Gas permeation resistance of various grades of perfluoroalkoxy-polytetrafluoroethylene copolymers</title><title>Journal of applied polymer science</title><addtitle>J. Appl. Polym. Sci</addtitle><description>The permeation resistance of various grades of perfluoroalkoxy (PFA)/polytetrafluoroethylene (PTFE) copolymers was tested. Specimens were compression molded using two different cooling techniques: a faster one (ice water quench) and a slower one (press cooled). Permeability, diffusion, and solubility coefficients were measured for hydrogen, nitrogen, and oxygen gases. The slow cooled samples always showed much better permeation resistance than those cooled quickly, demonstrating that process can be as important as polymer grade in determining the ultimate permeation resistance of PFA. For a given cooling method, molecular mass (chain length) had no appreciable affect on the permeation resistance. On the other hand, PFA grades with increased comonomer content appeared to have slightly diminished permeation resistance whereas grades with PTFE filler had better permeation resistance. Differences in permeation resistance were attributed to variation in crystallinity arising from differences in molecular architecture and processing.</description><subject>diffusion</subject><subject>fluoropolymers</subject><subject>perfluoroalkoxy (PFA)</subject><subject>polytetrafluoroethylene (PTFE) copolymer</subject><subject>structure-property relations</subject><issn>0021-8995</issn><issn>1097-4628</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp1kElPwzAQhS0EEmU58AvICYlD2nEcZzkiloKEALEerYkzgUBaBzuF5t_jEuDGaaT3vjeaeYztcRhzgGiCbTuOskxma2zEIU_DOImydTbyHg-zPJebbMu5VwDOJSQjhlN0QUt2RtjVZh5YcrXrcK4pMFXwgbY2Cxc8WyzJrRSPVs3CWIPNm1n2YWuavqPO4qBS99I3NKdAm5UzI-t22EaFjaPdn7nNHs5O74_Pw8vr6cXx0WWoY39wWAooS6khJimIQ5oUoixFXMS8EKRFXhY8SyDlWBRVpiPARFc5j6oyojSJQIttdjDsba15X5Dr1Kx2mpoG5-R_UELGwGUuPHg4gNoa5yxVqrX1DG2vOKhVicqXqL5L9OxkYD_rhvr_QXV0c_ObCIeEr5GWfwm0bypJRSrV09VUPcmr-xNxG6tHz-8PfIVG4bOtnXq4i4ALf6xMQMTiC6WEj0c</recordid><startdate>20090105</startdate><enddate>20090105</enddate><creator>Monson, L</creator><creator>Moon, Sung In</creator><creator>Extrand, C.W</creator><general>Wiley Subscription Services, Inc., A Wiley Company</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>20090105</creationdate><title>Gas permeation resistance of various grades of perfluoroalkoxy-polytetrafluoroethylene copolymers</title><author>Monson, L ; Moon, Sung In ; Extrand, C.W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4288-d30dd5c04e53e1076b3dd34b41b3ec39db186071abbf8c20a6cf912fd2e7620c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>diffusion</topic><topic>fluoropolymers</topic><topic>perfluoroalkoxy (PFA)</topic><topic>polytetrafluoroethylene (PTFE) copolymer</topic><topic>structure-property relations</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Monson, L</creatorcontrib><creatorcontrib>Moon, Sung In</creatorcontrib><creatorcontrib>Extrand, C.W</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>Journal of applied polymer science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Monson, L</au><au>Moon, Sung In</au><au>Extrand, C.W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Gas permeation resistance of various grades of perfluoroalkoxy-polytetrafluoroethylene copolymers</atitle><jtitle>Journal of applied polymer science</jtitle><addtitle>J. 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On the other hand, PFA grades with increased comonomer content appeared to have slightly diminished permeation resistance whereas grades with PTFE filler had better permeation resistance. Differences in permeation resistance were attributed to variation in crystallinity arising from differences in molecular architecture and processing.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/app.28858</doi><tpages>7</tpages></addata></record> |
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subjects | diffusion fluoropolymers perfluoroalkoxy (PFA) polytetrafluoroethylene (PTFE) copolymer structure-property relations |
title | Gas permeation resistance of various grades of perfluoroalkoxy-polytetrafluoroethylene copolymers |
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