Results 121 to 130 of about 18,682 (226)
, 2020 67 p. : ill. ; 30 cm.L’épuisement de ressources pétrolières, la cherté et la fluctuation quasi-permanente du prix du baril de pétrole, la diversification de sources d’approvisionnement en énergie ont amené les chercheurs et les scientifiques à s ...
Demri, Lilia
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Robust β‐myrcene block copolymer elastomeric vitrimers
Polymer International, EarlyView.Myrcene‐based vitrimeric elastomers were compared: statistical (poly(styrene‐stat‐myrcene‐stat‐AAEMA)] versus ‘hard–soft’ diblock (poly(styrene)‐block‐poly(myrcene‐co‐AAEMA)). The diblock's ability to anchor the glassy poly(styrene) blocks in a self‐assembled microstructure was effective – leading to four times higher tensile stress and ten times ...
Chong Yang Du +2 more
wiley +1 more source
Fonctionnalisation chimique du bois par transesterification des esters d'enol
, 2009 Au cours de cette étude, une méthode inédite de fonctionnalisation chimique de la matière lignocellulosique a été développée. Des groupes acyles de taille et de fonctionnalité variées ont ainsi été greffés à l’intérieur du bois, grâce à une réaction de ...
Jebrane, Mohamed
core +1 more source
Unsaturated biobased polyesters from bicyclic α‐pinene‐based diols
Polymer International, EarlyView.We present the synthesis of four biosourced unsaturated polyesters made from chiral terpene‐based diols and esters of renewable diacids. The resulting materials harbor a bicyclic pinene ring in their backbones which leads to enhanced thermal properties while still conferring susceptibility to enzyme hydrolysis for chains having a cis alkene.
Ganapathy Ranjani +4 more
wiley +1 more source
Procédé pour la transformation enzymatique des triglycérides d'une matière grasse, en particulier la matière grasse laitière [PDF]
, 1996 La présente invention a pour objet un nouveau procédé pour la transformation enzymatique des triglycérides d'une matière grasse principale par transfert d'acyle, interestérification, transestérification ou intrainterestérification, du type comprenant la ...
Montet, Didier +3 more
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Renewable methacrylate resin for vat photopolymerization derived from post‐consumer polyester waste
Polymer International, EarlyView.End‐of‐life poly(ethylene terephthalate) was upcycled into a renewable methacrylate crosslinker using microwave‐assisted methacrylation and applied in vat photopolymerization. The recycled resin enabled high‐resolution 3D printing with tunable mechanical performance, highlighting a circular strategy to reduce fossil‐based photopolymer feedstocks ...
Kylian Janssen +7 more
wiley +1 more source
MODELING THE KINETICS OF HYDROXYAPATITE CATALYZED TRANSESTERIFICATION REACTION
Al-Qadisiyah Journal for Engineering Science, 2015 A bone waste was utilized as a cost effective catalyst for the transesterification of Indian mustard oil. This high efficient and low-cost waste catalyst could make the biodiesel production from Indian mustard oil competitive with petroleum diesel.The ...
Ali A. Jazie Al-Khaledy
doaj
Catalytic behavior of Carica papaya latex in transesterification reactions
, 1997 La réaction de transestérification biocatalysée par le latex de Carica papaya est étudiée entre la tricapryline et différents donneurs d'acyles. Avec le latex brut, les triacylglycérols transestérifiés sont obtenus avec de bons rendements avec le laurate
Skarbek, A. +4 more
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Towards greener yttrium‐catalyzed ring‐opening polymerization via an all‐terpene reaction concept
Polymer International, EarlyView.Development of a terpene‐based catalytic system for ring‐opening polymerization of bio‐based lactones that reveals the steric effects of the nucleophile on initiation and alkoxide exchange, while simultaneously enabling post‐polymerization functionalization.
Lea‐Sophie Hornberger +3 more
wiley +1 more source
Journal of Polymer Science, EarlyView.Compatibilization markedly improves the top‐load compression performance and structural integrity of HDPE/PP blow‐molded bottles. Neat HDPE, PP, and HDPE/PP bottles exhibit premature neck cracking at relatively low strains, whereas the compatibilized HDPE/PP/C blend sustains substantially higher loads and greater deformation without cracking ...
Gabe Cihlar +4 more
wiley +1 more source