<?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>1390-0129</journal-id>
<journal-title><![CDATA[Revista Politécnica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Politéc. (Quito)]]></abbrev-journal-title>
<issn>1390-0129</issn>
<publisher>
<publisher-name><![CDATA[Escuela Politécnica Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1390-01292017000100013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio de la Cera Carnauba como Compatibilizante en Mezclas Poli (ácido láctico)-Almidón de Achira (Canna edulis)]]></article-title>
<article-title xml:lang="en"><![CDATA[Study of Carnauba Wax as Compatibilizer in Polylactide-Achira Starch (Canna edulis) blends]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Myrian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Encalada]]></surname>
<given-names><![CDATA[Katherine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valle]]></surname>
<given-names><![CDATA[Vladimir]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Escuela Politécnica Nacional Facultad de Ingeniería Química y Agroindustria ]]></institution>
<addr-line><![CDATA[Quito ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<volume>39</volume>
<numero>1</numero>
<fpage>13</fpage>
<lpage>18</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S1390-01292017000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S1390-01292017000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S1390-01292017000100013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La marcada diferencia en la afinidad del poli (ácido láctico) (PLA) y almidón requiere la búsqueda de nuevas alternativas de compatibilizantes no tóxicos, es así que el objetivo de la presente investigación es evaluar la miscibilidad de mezclas de PLA-almidón de achira-glicerol a diferentes concentraciones (1-5 %) de cera carnauba. Las mezclas fueron procesadas en una cámara de mezclado a 120 °C, durante 20 min, a velocidad de giro de 90 rpm; posteriormente fueron prensadas a 120 °C y 21 MPa durante 10 min. Los resultados, evaluados a través de microscopía óptica y ensayos mecánicos, mostraron la factibilidad del uso de este compatibilizante, obteniéndose mayor homogeneidad de las mezclas al emplearse 1% de cera carnauba. Se concluyó que el tamaño y distribución de las heterogeneidades existentes en el material provocó concentradores de tensiones que a su vez provocaron elevada variabilidad en las propiedades mecánicas estudiadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The huge difference in terms of affinity between polylactide (PLA) and starch demands to find new alternatives of non- toxic compatibilizers. In this sense, the present paper aims to evaluate the miscibility of PLA, achira starch and glycerol at different amounts of carnauba wax (1-5 %). The methodology consisted of mixing the components into a rheometer at 120 ° C, for 20 min at a rotational speed of 90 rpm, then they were pressed at 120 °C and 21 MPa during 10 min. The results obtained throughout optical microscopy and mechanical test, shown a feasible use of carnauba wax as compatibilizer of this blend. Additionally, the highest homogeneity was obtained while the compatibilizer were at 1%. In conclusion, the size and distribution of heterogeneities presented over the material caused stress concentrators which resulted in an important variability over the mechanical properties.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Poli(ácido láctico)]]></kwd>
<kwd lng="es"><![CDATA[Almidón de achira]]></kwd>
<kwd lng="es"><![CDATA[Cera carnauba]]></kwd>
<kwd lng="es"><![CDATA[Miscibilidad]]></kwd>
<kwd lng="en"><![CDATA[Polylactide]]></kwd>
<kwd lng="en"><![CDATA[Achira starch]]></kwd>
<kwd lng="en"><![CDATA[Carnauba wax]]></kwd>
<kwd lng="en"><![CDATA[Miscibility]]></kwd>
</kwd-group>
</article-meta>
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