Results 71 to 80 of about 973 (156)
Poliuretano/grafeno nanokonpositeen azterketa biskoelastikoa: perkolazioa eta kristalizazioa
EKAIA Euskal Herriko Unibertsitateko Zientzia eta Teknologia Aldizkaria, 2013 Poliuretano/Grafeno (PUR/Grafeno) nanokonpositeak prestatu eta beraien propietate biskoelastikoak aztertu ditugu, helburu hauek lortzeko asmoz: a) Polimero-grafeno sare mistoaren osaketa aztertzea, perkolazioaren atalasea erabakitzeko b) Grafeno nanokargek poliuretanoaren kristalizazioan eduki dezaketen eragina ikertzea d) PURa hot melt itsasgarria ...Leire Sangroniz, Antxon Santamariaopenaire +1 more sourceCargas minerais em poliuretano elastomérico [PDF]
, 2008 Poliuretanos elastoméricos (TPU) são largamente utilizados nas mais diversas aplicações devido à possibilidade de variação na estrutura química. A cadeia deste tipo de polímero consiste de segmentos “flexíveis” e “rígidos” que dão origem a uma segregação Freitas, Bruno Souza de, Rocha, Vinícius Azeredo +1 morecore Sintesis de poliuretanos a partir de polioles obtenidos a partir del aceite de higuerilla modificado por transesterificación con pentaeritritol Polyurethanes sintetized of polyols obtained from castor oil modified by transesterification with pentaerythritol</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Química Nova</i>, 2008 </span><br><span class="r_content">Castor oil was reacted by transesterification with various percentages in mass of pentaerythritol to obtain different esters of pentaerythritol. Alternatively, glycerol was also used instead of pentaerythritol for the same reaction in order to establish ...</span><br><span class="r_sub"><i>Manuel F. Valero<span id="ma_8" style="display:none">, Jorge E. Pulido, Álvaro Ramírez, Zhengdong Cheng</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_8')">+3 more</a></small></i></span><br><small><a href="https://doaj.org/article/cb845b3b31224c5f94e377eef3c8ac64" target="_blank" rel="nofollow" title="doaj.org/article/cb845b3b31224c5f94e377eef3c8ac64">doaj</a> </small> <div id="more_8" style="display:none"><a href="/sci_redir.php?doi=10.1590%2FS0100-40422008000800031" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1590/S0100-40422008000800031'); alert('Copied the doi');">copy doi</a> <small>(10.1590/S0100-40422008000800031)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_8')">+1 more source</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.34626/h63d-6f49" target="_blank" rel="nofollow">Formação e estrutura dos poliuretanos segmentados</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16">, 2000 </span><br><span class="r_content">Dissertação apresentada para obtenção do grau de Doutor em Engenharia Química, na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor Mário Rui Pinto Ferreira Nunes da Costa </span><br><small><a href="https://explore.openaire.eu/search/publication?pid=10.34626%2Fh63d-6f49" target="_blank" rel="nofollow" title="openaire.eu/search/publication?pid=10.34626%2Fh63d-6f49">openaire</a> </small> <div id="more_9" style="display:none"><a href="/sci_redir.php?doi=10.34626%2Fh63d-6f49" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="https://isni.org/isni/000000040392388X" target="_blank" rel="nofollow" title="isni.org/isni/000000040392388X">isni.org</a><br> <a href="javascript:navigator.clipboard.writeText('10.34626/h63d-6f49'); alert('Copied the doi');">copy doi</a> <small>(10.34626/h63d-6f49)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_9')">+2 more sources</a></small><br></div><div class="r"><p class="r_title"><a href="https://doi.org/10.1590/S0100-40422008000600030" target="_blank" rel="nofollow">Síntese e caracterização de dispersões aquosas de poliuretanos à base de copolímeros em bloco de poli(glicol etilênico) e poli(glicol propilênico) Synthesis and characterization of polyurethane aquous dispersions based on poly(ethylene glycol) and poly(propylene glycol) block copolymers</a> </p><span class="r_subtitle"><img src="/img/openaccess.ico" alt="open access: yes" title="open access: yes" width="16" height="16"><i>Química Nova</i>, 2008 </span><br><span class="r_content">Non-polluting polyurethane aqueous dispersions, with 40% of solids content, were synthesized based on block copolymers of poly(ethylene glycol) and poly(propylene glycol) (PEG-b-PPG), with PEG hydrophilic segments content of 7 and 25%, poly(propylene ...</span><br><span class="r_sub"><i>Fernanda M. B. Coutinho<span id="ma_10" style="display:none">, Marcia C. Delpech, Cristiane C. Santos, Rosiléa B. L. Almeida</span> <small><a href="#" style="color:#808080;" onClick="return toggle_div(this, 'ma_10')">+3 more</a></small></i></span><br><small><a href="https://doaj.org/article/7186e50905fa4784bbe85dd66497f8c8" target="_blank" rel="nofollow" title="doaj.org/article/7186e50905fa4784bbe85dd66497f8c8">doaj</a> </small> <div id="more_10" style="display:none"><a href="/sci_redir.php?doi=10.1590%2FS0100-40422008000600030" target="_blank" rel="nofollow">openaccessbutton.org (pdf)</a><br><a href="javascript:navigator.clipboard.writeText('10.1590/S0100-40422008000600030'); alert('Copied the doi');">copy doi</a> <small>(10.1590/S0100-40422008000600030)</small><br></div><small><a href="#" onClick="return toggle_div(this, 'more_10')">+1 more source</a></small><br></div><div class="r"><div style="margin-bottom:2px;overflow:hidden"><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-polyurethanes/" class="suggestion"onclick="show_loader();"><b>polyurethanes</b></a><br/><a href="/q-poliuretano/" class="suggestion"onclick="show_loader();"><b>poliuretano</b></a><br/><a href="/q-dispers%C3%B5es_aquosas/" class="suggestion"onclick="show_loader();"><b>dispersões aquosas</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-polyurethane/" class="suggestion"onclick="show_loader();"><b>polyurethane</b></a><br/><a href="/q-aqueous_dispersions/" class="suggestion"onclick="show_loader();"><b>aqueous dispersions</b></a><br/><a href="/q-propriedades_mec%C3%A2nicas/" class="suggestion"onclick="show_loader();"><b>propriedades mecânicas</b></a><br/></div><div style="display: inline-block; float: left; font-size: small; padding-right: 16px; margin-top: -1px; padding-bottom: 1px;"><a href="/q-castor_oil/" class="suggestion"onclick="show_loader();"><b>castor oil</b></a><br/><a href="/q-nanocomposites/" class="suggestion"onclick="show_loader();"><b>nanocomposites</b></a><br/><a href="/q-montmorilonita/" class="suggestion"onclick="show_loader();"><b>montmorilonita</b></a><br/></div></div></div><div class="pagenav"><a href="/q-poliuretanos/p-7/" rel="nofollow"><b>previous</b></a> <a href="/q-poliuretanos/p-6/" rel="nofollow">6</a> <a href="/q-poliuretanos/p-7/" rel="nofollow">7</a> <b>8</b> <a href="/q-poliuretanos/p-9/" rel="nofollow">9</a> <a href="/q-poliuretanos/p-10/" rel="nofollow">10</a> <a href="/q-poliuretanos/p-9/" id="next" rel="nofollow"><b>next</b></a> </div><br></div>
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