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Crystallization behavior of long-chain branching polylactide / Jianye Liu in Industrial & engineering chemistry research, Vol. 51 N° 42 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13670–13679 Titre : Crystallization behavior of long-chain branching polylactide Type de document : texte imprimé Auteurs : Jianye Liu, Auteur ; Shijun Zhang, Auteur ; Liying Zhang, Auteur Année de publication : 2012 Article en page(s) : pp. 13670–13679 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Crystallization  Polylactide Résumé : The crystallization behavior of long-chain branched (LCB) poly(l-lactide) (PLLA), which were successfully prepared by successive functional group reactions, was studied by nonisothermal and isothermal methods in a wide temperature range. The density of the nuclei for LCB samples during crystallization was much higher than that for linear PLLA. According to qualitative information about the chain topologies of the branched PLLAs, obtained by a combination of linear viscoelasticity and branch-on-branch (BOB) dynamic modeling, it should be the backbones of LCB that are able to act as nuclei and thus markedly enhance the crystallization rate of PLLA. Moreover, a kinetic analysis of crystallization was performed using secondary nucleation theory. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301567n [article] Crystallization behavior of long-chain branching polylactide [texte imprimé] / Jianye Liu, Auteur ; Shijun Zhang, Auteur ; Liying Zhang, Auteur . - 2012 . - pp. 13670–13679. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13670–13679 Mots-clés : Crystallization  Polylactide Résumé : The crystallization behavior of long-chain branched (LCB) poly(l-lactide) (PLLA), which were successfully prepared by successive functional group reactions, was studied by nonisothermal and isothermal methods in a wide temperature range. The density of the nuclei for LCB samples during crystallization was much higher than that for linear PLLA. According to qualitative information about the chain topologies of the branched PLLAs, obtained by a combination of linear viscoelasticity and branch-on-branch (BOB) dynamic modeling, it should be the backbones of LCB that are able to act as nuclei and thus markedly enhance the crystallization rate of PLLA. Moreover, a kinetic analysis of crystallization was performed using secondary nucleation theory. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301567n