<?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>2224-5421</journal-id>
<journal-title><![CDATA[Revista Cubana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cub Quim]]></abbrev-journal-title>
<issn>2224-5421</issn>
<publisher>
<publisher-name><![CDATA[Ediciones UO, Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-54212020000100117</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nanocompuestos biodegradables con potencial aplicación al mercado de envases: obtención y caracterización]]></article-title>
<article-title xml:lang="en"><![CDATA[Biodegradable nanocomposite for the packaging sector: preparation and characterization]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Infante]]></surname>
<given-names><![CDATA[Julio Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Hung]]></surname>
<given-names><![CDATA[Hassan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Franco-Urquiza]]></surname>
<given-names><![CDATA[Edgar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gámez-Pérez]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lluisa-Maspoch]]></surname>
<given-names><![CDATA[Maria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Holguín Centro de Estudios de Agroecosistemas Áridos ]]></institution>
<addr-line><![CDATA[Holguín ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Oriente Departamento de Química ]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Ingeniería y Desarrollo Industrial  ]]></institution>
<addr-line><![CDATA[Querétaro ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Jaume I Grupo de Polímeros y Materiales Avanzados ]]></institution>
<addr-line><![CDATA[Castelló ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universitat Politècnica de Catalunya Centre Català del Plàstic ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>32</volume>
<numero>1</numero>
<fpage>117</fpage>
<lpage>135</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212020000100117&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212020000100117&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212020000100117&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En este trabajo se investiga la influencia del procesado, del contenido de agente reforzante y de un tratamiento térmico de rejuvenecimiento en el comportamiento a fractura de láminas de poli (ácido láctico) (PLA), reforzadas con una nanoarcilla organomodificada. La estructura de los nanocompuestos se estudió mediante cromatografía de permeación de geles, microscopía electrónica de transmisión y microscopía electrónica de barrido y haz iónico focalizado. Los comportamientos térmicos y la fractura se siguieron mediante calorimetría diferencial de barrido y la técnica del trabajo esencial de fractura (EWF) respectivamente. El procesado ocasionó la degradación de las cadenas del PLA, fenómeno este acentuado por la montmorillonita. El tratamiento de rejuvenecimiento borró completamente el estado de envejecimiento, provocando una transición del comportamiento frágil-dúctil que permitió la aplicación de la técnica del EWF. La tenacidad de fractura del PLA envejecido se incrementa notablemente mediante el refuerzo con nanoarcillas y/o la aplicación del tratamiento de rejuvenecimiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this work, the effect of processing, reinforcing agent content and deageing treatment on the fracture behaviour of polylactic acid sheets reinforced with organomodified nanoclay was assessed. The structure of the nanocomposites was studied by gel permeation chromatography, transmission electron microscopy and focused ion beam milling and scanning electron microscopy. The thermal and fracture behaviours have been assessed by differential scanning calorimetry and the essential work of fracture (EWF) approach respectively. Processing caused the degradation of PLA chains; phenomena that was enhanced by the presence of montmorillonite. The de-aging treatment completely erased the ageing state of the sheets, promoting a brittle-ductile transition and enabling the application of the EWF. The fracture toughness of aged PLA is considerably enhanced by nanoclay reinforcement and/or application of a deaging treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[nanocompuestos]]></kwd>
<kwd lng="es"><![CDATA[poli (ácido láctico)]]></kwd>
<kwd lng="es"><![CDATA[montmorillonita]]></kwd>
<kwd lng="es"><![CDATA[trabajo esencial de fractura]]></kwd>
<kwd lng="en"><![CDATA[nanocomposites]]></kwd>
<kwd lng="en"><![CDATA[polylactic acid]]></kwd>
<kwd lng="en"><![CDATA[montmorillonite]]></kwd>
<kwd lng="en"><![CDATA[essential work of fracture]]></kwd>
</kwd-group>
</article-meta>
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<person-group person-group-type="author">
<name>
<surname><![CDATA[BUCKNALL]]></surname>
<given-names><![CDATA[C. B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quantitative Approaches to Particle Cavitation, Shear Yielding, and Crazing in Rubber-Toughened Polymers]]></article-title>
<source><![CDATA[Journal of Polymer Science: Part B: Polymer Physics]]></source>
<year>2007</year>
<volume>45</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1399-409</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
