Grafting of poly (lactic acid) with maleic anhydride using supercritical carbon dioxide
The aim of this work was to modify poly lactic acid (PLA) via free radical grafting with maleic anhydride (MA) by using supercritical carbon dioxide (SCCO2). Benzoyl peroxide (BPO) was used as an initiator. The solubility of MA in SCCO2 was first determined to estimate the suitable grafting conditio...
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| Veröffentlicht in: | IOP conference series. Materials Science and Engineering 2015-07, Vol.87 (1), p.12066 |
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| creator | Khankrua, R Pivsa-Art, S Hiroyuki, H Suttiruengwong, S |
| description | The aim of this work was to modify poly lactic acid (PLA) via free radical grafting with maleic anhydride (MA) by using supercritical carbon dioxide (SCCO2). Benzoyl peroxide (BPO) was used as an initiator. The solubility of MA in SCCO2 was first determined to estimate the suitable grafting conditions and equilibrium. From the solubility study of MA in SCCO2, it was found that the solubility of MA in SCCO2 increased with the increasing pressure and dissolution time. PLA films were first prepared by compression molding. The ratio of MA to BPO was 2:1. The reaction temperature and pressure were 70°C and 100 bar respectively. The grafting reaction and the degree of grafting were characterized by nuclear magnetic resonance (NMR) spectroscopy and titration, respectively. Scanning electron microscope (SEM) technique and contact angle were used to confirm the changes in physical properties of PLA film grafted MA. NMR spectrum indicated that the grafting of MA onto PLA was successively achieved. Degree of grafting by using SCCO2 was as high as 0.98%. This provided rather high grafting degree compared with other processes. SEM pictures showed the rough surface structure on modified PLA film. In addition, contact angle results showed an improvement of the hydrophilicity by maleic anhydride grafting onto polymers. |
| doi_str_mv | 10.1088/1757-899X/87/1/012066 |
| format | Article |
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Benzoyl peroxide (BPO) was used as an initiator. The solubility of MA in SCCO2 was first determined to estimate the suitable grafting conditions and equilibrium. From the solubility study of MA in SCCO2, it was found that the solubility of MA in SCCO2 increased with the increasing pressure and dissolution time. PLA films were first prepared by compression molding. The ratio of MA to BPO was 2:1. The reaction temperature and pressure were 70°C and 100 bar respectively. The grafting reaction and the degree of grafting were characterized by nuclear magnetic resonance (NMR) spectroscopy and titration, respectively. Scanning electron microscope (SEM) technique and contact angle were used to confirm the changes in physical properties of PLA film grafted MA. NMR spectrum indicated that the grafting of MA onto PLA was successively achieved. Degree of grafting by using SCCO2 was as high as 0.98%. This provided rather high grafting degree compared with other processes. SEM pictures showed the rough surface structure on modified PLA film. In addition, contact angle results showed an improvement of the hydrophilicity by maleic anhydride grafting onto polymers.</description><identifier>ISSN: 1757-8981</identifier><identifier>ISSN: 1757-899X</identifier><identifier>EISSN: 1757-899X</identifier><identifier>DOI: 10.1088/1757-899X/87/1/012066</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Benzoyl peroxide ; Carbon dioxide ; Contact angle ; Free radicals ; Grafting ; Maleic anhydride ; NMR ; NMR spectroscopy ; Nuclear magnetic resonance ; Physical properties ; Polylactic acid ; Pressure molding ; Scanning electron microscopy ; Solubility ; Surface structure ; Titration</subject><ispartof>IOP conference series. Materials Science and Engineering, 2015-07, Vol.87 (1), p.12066</ispartof><rights>Published under licence by IOP Publishing Ltd</rights><rights>2015. 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Materials Science and Engineering</title><addtitle>IOP Conf. Ser.: Mater. Sci. Eng</addtitle><description>The aim of this work was to modify poly lactic acid (PLA) via free radical grafting with maleic anhydride (MA) by using supercritical carbon dioxide (SCCO2). Benzoyl peroxide (BPO) was used as an initiator. The solubility of MA in SCCO2 was first determined to estimate the suitable grafting conditions and equilibrium. From the solubility study of MA in SCCO2, it was found that the solubility of MA in SCCO2 increased with the increasing pressure and dissolution time. PLA films were first prepared by compression molding. The ratio of MA to BPO was 2:1. The reaction temperature and pressure were 70°C and 100 bar respectively. The grafting reaction and the degree of grafting were characterized by nuclear magnetic resonance (NMR) spectroscopy and titration, respectively. Scanning electron microscope (SEM) technique and contact angle were used to confirm the changes in physical properties of PLA film grafted MA. NMR spectrum indicated that the grafting of MA onto PLA was successively achieved. Degree of grafting by using SCCO2 was as high as 0.98%. This provided rather high grafting degree compared with other processes. SEM pictures showed the rough surface structure on modified PLA film. In addition, contact angle results showed an improvement of the hydrophilicity by maleic anhydride grafting onto polymers.</description><subject>Benzoyl peroxide</subject><subject>Carbon dioxide</subject><subject>Contact angle</subject><subject>Free radicals</subject><subject>Grafting</subject><subject>Maleic anhydride</subject><subject>NMR</subject><subject>NMR spectroscopy</subject><subject>Nuclear magnetic resonance</subject><subject>Physical properties</subject><subject>Polylactic acid</subject><subject>Pressure molding</subject><subject>Scanning electron microscopy</subject><subject>Solubility</subject><subject>Surface structure</subject><subject>Titration</subject><issn>1757-8981</issn><issn>1757-899X</issn><issn>1757-899X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kE9LxDAQxYMouK5-BCHgRQ-1SdP86VEWXYUFL4reQpqkbpZuU5MW7be3pbLePM0wvPdm5gfAJUa3GAmRYk55IoriPRU8xSnCGWLsCCwO8-NDL_ApOItxhxDjeY4W4G0dVNW55gP6Cra-HuB1rXTnNFTamRv45bot3KvaTpNmO5jgjIV9nByxb23QwY1qVUOtQukbaJz_HiXn4KRSdbQXv3UJXh_uX1aPyeZ5_bS62ySacNQl40FVxgzGRHNtaM5KblFelIUWtMCKCFKpTBdVhhRVrFSKGEIzkbPC0NKUlCzB1ZzbBv_Z29jJne9DM66UGWVk_B5leFTRWaWDjzHYSrbB7VUYJEZyYignPnJiJQWXWM4MRx-efc63f8H_e34AI_JztA</recordid><startdate>20150716</startdate><enddate>20150716</enddate><creator>Khankrua, R</creator><creator>Pivsa-Art, S</creator><creator>Hiroyuki, H</creator><creator>Suttiruengwong, S</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</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>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20150716</creationdate><title>Grafting of poly (lactic acid) with maleic anhydride using supercritical carbon dioxide</title><author>Khankrua, R ; Pivsa-Art, S ; Hiroyuki, H ; Suttiruengwong, S</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-981f26d113c7cd546b7e049b9c8591a383fa2c9f20a5a6baa3d3528469d5bdb53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Benzoyl peroxide</topic><topic>Carbon dioxide</topic><topic>Contact angle</topic><topic>Free radicals</topic><topic>Grafting</topic><topic>Maleic anhydride</topic><topic>NMR</topic><topic>NMR spectroscopy</topic><topic>Nuclear magnetic resonance</topic><topic>Physical properties</topic><topic>Polylactic acid</topic><topic>Pressure molding</topic><topic>Scanning electron microscopy</topic><topic>Solubility</topic><topic>Surface structure</topic><topic>Titration</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khankrua, R</creatorcontrib><creatorcontrib>Pivsa-Art, S</creatorcontrib><creatorcontrib>Hiroyuki, H</creatorcontrib><creatorcontrib>Suttiruengwong, S</creatorcontrib><collection>IOP Publishing</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</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 Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering 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>Engineering Collection</collection><jtitle>IOP conference series. Materials Science and Engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khankrua, R</au><au>Pivsa-Art, S</au><au>Hiroyuki, H</au><au>Suttiruengwong, S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Grafting of poly (lactic acid) with maleic anhydride using supercritical carbon dioxide</atitle><jtitle>IOP conference series. Materials Science and Engineering</jtitle><addtitle>IOP Conf. Ser.: Mater. Sci. Eng</addtitle><date>2015-07-16</date><risdate>2015</risdate><volume>87</volume><issue>1</issue><spage>12066</spage><pages>12066-</pages><issn>1757-8981</issn><issn>1757-899X</issn><eissn>1757-899X</eissn><abstract>The aim of this work was to modify poly lactic acid (PLA) via free radical grafting with maleic anhydride (MA) by using supercritical carbon dioxide (SCCO2). Benzoyl peroxide (BPO) was used as an initiator. The solubility of MA in SCCO2 was first determined to estimate the suitable grafting conditions and equilibrium. From the solubility study of MA in SCCO2, it was found that the solubility of MA in SCCO2 increased with the increasing pressure and dissolution time. PLA films were first prepared by compression molding. The ratio of MA to BPO was 2:1. The reaction temperature and pressure were 70°C and 100 bar respectively. The grafting reaction and the degree of grafting were characterized by nuclear magnetic resonance (NMR) spectroscopy and titration, respectively. Scanning electron microscope (SEM) technique and contact angle were used to confirm the changes in physical properties of PLA film grafted MA. NMR spectrum indicated that the grafting of MA onto PLA was successively achieved. Degree of grafting by using SCCO2 was as high as 0.98%. This provided rather high grafting degree compared with other processes. SEM pictures showed the rough surface structure on modified PLA film. In addition, contact angle results showed an improvement of the hydrophilicity by maleic anhydride grafting onto polymers.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1757-899X/87/1/012066</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Benzoyl peroxide Carbon dioxide Contact angle Free radicals Grafting Maleic anhydride NMR NMR spectroscopy Nuclear magnetic resonance Physical properties Polylactic acid Pressure molding Scanning electron microscopy Solubility Surface structure Titration |
| title | Grafting of poly (lactic acid) with maleic anhydride using supercritical carbon dioxide |
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