<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2020000500617</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.66.617</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of nature and degree of crosslinking agent of poly(hydroxy-butyl-methacrylate-co-2-ethyl-hexyl-acrylate) networks on the swelling properties in nematic liquid crystal 5cb]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mellal]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
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<surname><![CDATA[Habchi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dali Youcef]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Université Abou Bekr Belkaid Laboratoire de Recherche sur les Macromolécules ]]></institution>
<addr-line><![CDATA[Tlemcen ]]></addr-line>
<country>Algérie</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Ecole Supérieure en Sciences Appliquées  ]]></institution>
<addr-line><![CDATA[Tlemcen ]]></addr-line>
<country>Algérie</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Université Abou BekrBelkaid Laboratoire de Physique Théorique ]]></institution>
<addr-line><![CDATA[Tlemcen ]]></addr-line>
<country>Algérie</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<volume>66</volume>
<numero>5</numero>
<fpage>617</fpage>
<lpage>626</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2020000500617&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2020000500617&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2020000500617&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A swelling rate study of the poly (hydroxy-butyl-methacrylate-co-2-ethyl-hexyl-acrylate) / 5CB was conducted here to improve the swelling behavior of the physicochemical properties of the copolymer networks in liquid crystals. We experimentally measured the nature and the crosslinking agent concentration effects on the swelling rate. Initial mixtures are composed of monofunctional monomers, hydroxy-butylmethacrylate (HBMA) and 2-ethyl-hexyl-acrylate (2-EHA), and one of the three bifunctional monomers, poly-propylene-glycol -di-acrylate (PPGDA), tri-propylene-glycol-di-acrylate (TPGDA) or 1,6-hexane-diol-di-acrylate (HDDA) as well as 2-hydroxy-2-methylpropiophenone (Darocur 1173 ) as a photoinitiator. The copolymers were elaborated by UV irradiation with a reactive formulation. The face-centered central composite design (FC-CCD) of experiments was used to determine the temperature, the crosslinking density and their interactions influence on the swelling behavior of poly (HBMA-co-EHA/crosslinker/Darocur 1173) in the 5CB liquid crystal. The results predicted by this model showed good agreement with experimental values.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Liquid crystal]]></kwd>
<kwd lng="en"><![CDATA[crosslinking]]></kwd>
<kwd lng="en"><![CDATA[swelling behavior]]></kwd>
<kwd lng="en"><![CDATA[face-centered central composite design (FC-CCD)]]></kwd>
</kwd-group>
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