{"corpus_id":103532705,"paper_sha":"2376ad6d7e34e3e13cd4e3c759d054c5546574dd","doi":"10.1016/J.PORGCOAT.2018.01.003","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":2782699377,"dblp_id":null,"acl_id":null,"title":"Spray process to styrene grafting onto polyethylene film surface for paintability enhancement","year":2018,"publication_date":"2018-04-01","venue":"","journal":{"name":"Progress in Organic Coatings","pages":"91-101","volume":"117"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Materials Science","Chemistry"],"reference_count":57,"citation_count":10,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://ri.conicet.gov.ar/bitstream/11336/88012/2/CONICET_Digital_Nro.c3f95bd9-c022-41dd-a914-afb604f127d4_A.pdf","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/2376ad6d7e34e3e13cd4e3c759d054c5546574dd","s2_open_access_license":"CCBYNCSA","s2_open_access_status":"GREEN","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Abstract A direct and fast post-processing method to modify polyethylene (PE) film surface is proposed in order to improve its paintability performance without changing its bulk properties. This goal is achieved by grafting styrene onto the PE film surface using a macrocarbocationic copolymerization reaction where both catalysts and reagents are sprayed directly on softened film respectively. Pure styrene as grafting molecule and aluminium chloride suspended in n-heptane as catalyst are used. Grafting reaction occurrence was assessed by analyzing the reacted film surface before and after extraction of non-grafted reaction products. The results confirmed by three independent analytical techniques evidence reaction occurrence. A graft-copolymer layer remains onto the PE film surface even when physically adhered reaction products were extracted. This layer enhances PE film water-affinity and paintability either with water or acrylics paints because of the grafted aromatic group and roughness increase. Besides, this modification increments PE thermal degradation temperature giving another beneficial effect for future film applications. The proposed modification film methodology has potential application in continuous film production as reagents spraying onto softened films could be applicable in a cast film extrusion line.","claims":[{"public_id":"cl_4dc6c2a91aea475485e6e3b6c0d253d5","status":"active","text":"A macrocarbocationic copolymerization reaction sprays pure styrene and an aluminium chloride catalyst suspended in n-heptane directly onto softened polyethylene film to graft styrene onto the film surface without altering the film's bulk properties.","confidence":0.9,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":136,"public_id":"3c2apqe3ut","public_label":"Anonymous 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styrene layer and the resulting increase in surface roughness enhance the polyethylene film's water-affinity and paintability with both water-based and acrylic paints.","confidence":0.85,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":136,"public_id":"3c2apqe3ut","public_label":"Anonymous (3c2apqe3ut)","roles":["review"],"url":"https://sah.borca.ai/u/3c2apqe3ut"}],"url":"https://sah.borca.ai/claims/cl_7862a62b377b183250af5f9834d29572"},{"public_id":"cl_a1fb718cd7760788c9de8bd8b933a470","status":"active","text":"Three independent analytical techniques confirm that a graft-copolymer layer remains on the polyethylene film surface even after extraction of non-grafted, physically adhered reaction products, evidencing genuine styrene grafting.","confidence":0.85,"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["extraction"],"url":"https://sah.borca.ai/u/322360f1c1"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":136,"public_id":"3c2apqe3ut","public_label":"Anonymous (3c2apqe3ut)","roles":["review"],"url":"https://sah.borca.ai/u/3c2apqe3ut"}],"url":"https://sah.borca.ai/claims/cl_a1fb718cd7760788c9de8bd8b933a470"}],"concepts":[{"public_id":"co_00ca35700b9fa3d91a6b30ff770a7683","status":"active","name":"macrocarbocationic copolymerization reaction","description":"A cationic copolymerization mechanism proceeding through macrocarbocation intermediates, used here to graft styrene onto the polyethylene film surface.","types":["method"],"aliases":[],"contributors":[{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale 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