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dc.contributor.authorYousefzade, Omid
dc.contributor.authorJeddi, Javad
dc.contributor.authorFranco García, María Lourdes
dc.contributor.authorPuiggalí Bellalta, Jordi
dc.contributor.authorGarmabi, Hamid
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2019-11-04T19:01:07Z
dc.date.issued2020-01-15
dc.identifier.citationYousefzade, O. [et al.]. Crystallization kinetics of chain extended poly(L-lactide)s having different molecular structures. "Materials chemistry and physics", 15 Gener 2020, vol. 240, núm. 122217, p. 122217:1-122217:11.
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/2117/171482
dc.description.abstractPoly(L-lactide)s (PLLAs) with different chain structures were prepared by reactive melt processing and using Joncryl ADR as chain extender. Results of gel permeation chromatography (GPC) revealed that chain extended PLLAs had high molecular weights and two differentiated molecular weight distributions. Linear rheology was sensitive to the obtained molecular structures and revealed as the increase on the amount of chain extender gradually led to a decrease of the loss factor in the whole frequency region and to an increase of melt viscosity and both storage and loss moduli. In addition, the entanglement density increased significantly with addition of chain extender and had a significant influence on crystallization kinetics. Correlation of molecular weight, viscosity and entanglements changed the crystallinity and crystallization kinetics of chain extended PLLAs in both isothermal and non-isothermal crystallizations. Specifically, samples prepared from 1 wt-% of Joncryl (PLLA1R) revealed the highest nucleation and the fastest crystallization rate.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshPolylactic acid
dc.subject.lcshCrystallization
dc.subject.otherChain extended PLLA
dc.subject.otherMolecular structure
dc.subject.otherRheological properties
dc.subject.otherCrystallization kinetics
dc.titleCrystallization kinetics of chain extended poly(L-lactide)s having different molecular structures
dc.typeArticle
dc.subject.lemacÀcid polilàctic
dc.subject.lemacCristal·lització
dc.contributor.groupUniversitat Politècnica de Catalunya. PSEP - Polimers Sintètics: Estructura i Propietats. Polimers Biodegradables.
dc.identifier.doi10.1016/j.matchemphys.2019.122217
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/abs/pii/S0254058419310326
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac25863428
dc.description.versionPostprint (author's final draft)
dc.date.lift2022-01-30
local.citation.authorYousefzade, O.; Jeddi, J.; Franco, L.; Puiggali, J.; Garmabi, H.
local.citation.publicationNameMaterials chemistry and physics
local.citation.volume240
local.citation.number122217
local.citation.startingPage122217:1
local.citation.endingPage122217:11


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