GRANGÉ, Jérémie; RADCHENKO, Alexei; MATMOUR, Rachid; JEAN‐BAPTISTE DIT DOMINIQUE, François; GRELIER, Stéphane; PERUCH, Frédéric

doi:10.1002/pcr2.10075

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GRANGÉ, Jérémie
Team 1 LCPO : Polymerization Catalyses & Engineering
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

RADCHENKO, Alexei
Team 1 LCPO : Polymerization Catalyses & Engineering

MATMOUR, Rachid

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Polymer Crystallization. 2019, vol. 2, n° 4, p. e10075

Wiley

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Natural Rubber (NR) is a polyisoprene (PI) from renewable resources that exhibits mechanical and thermal properties not accessible with synthetic polyisoprenes (IR). In this article, it was developed a simple route to synthesize new models of NR (PI with a pure microstructure (100% 1,4-cis) and two fatty esters linked to the polymer chain-end) in order to clarify the role played by lipids on the "cold crystallization" (CCr) of NR. DSC analysis of this new hybrid polymer revealed that the lipids linked to the backbone were able to crystallize despite of the amorphous matrix, the crystallization temperature being dependent on the length of the linked fatty chain. Furthermore, it was observed that the linked fatty chains prevented PI to crystallize at low temperature (-25°C). Finally, the addition of free fatty acids to the hybrid polymer enhanced the crystallization of the PI chain, more particularly when stearic acid and methyl linoleate were used simultaneously as additives. A 1< Réduire

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New insight into the cold crystallization of natural rubber: The role of linked and free fatty chains

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