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ITS » Scientific Articles » Luar ITS
Posted by hikmatun_n@chem-eng.its.ac.id at 01/09/2016 14:11:56  •  364 Views


EFFECTS OF GLYCINE-BASED IONIC LIQUID ON SPHERULITE MORPHOLOGY OF POLYL-LACTIDE

Author :
HIKMATUN NIMAH ( 198410102009122006 )
EAMOR M.WOO




ABSTRAK

Crystalline morphology lamellar assembly spherulitic growth rate and physical properties of polyl-lactide acid PLLA modified by a room-temperature ionic liquid IL N-alkyl-substituted-glycine ester NN-dimethyl-N-propyl glycine ethyl ester DMPGlyET bisfluoromethanesufonylimide TFSI8722 are investigated by using polarized optical microscopy optical microscopy differential scanning calorimetric and atomic-force microscopy. Thermal analyses and in situ microscopy characterization reveal the PLLAIL mixture with upper-critical-solution-temperature behavior. Crystalline morphology of PLLA is significantly changed by the addition of IL to display massive diversification of spherulites morphology which has never been reported before in neat PLLA or PLLA blends with polymers. The morphological change and diversifications in PLLAIL mixture are associated with strong interactions between PLLA and IL which impede the melt crystallization of PLLA and tend to form PLLA nuclei of various geometry shapes. In addition neat PLLA is generally brittle with extensive crack formation during postcrystallization cooling process however with the addition of IL cracks are reduced or diminished entirely potentially to enhance the performance and properties of PLLA.



KeywordsPLLA; ionic liquid; blend; novel spherulite morphology; crystallization
 
Subject:  Crystalline
Date Create: 06/05/2015
Type: Text
Format: PDF
Language: English
Identifier: ITS-Article-99005160010183
Collection ID: 99005160010183
Call Number: 541.395 Hik e


Source
article of journals macromolecular chemistry and physics

Coverage
ITS Community

Rights
Macromol. Chem. Phys. 2015, 216, 1291−1301 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim




[ Download - Summary ]

ITS-Article-99005160010183-41787.pdf



[ Link of Contents]
  1. EFFECTS OF GLYCINE-BASED IONIC LIQUID ON SPHERULITE MORPHOLOGY OF POLY(L-LACTIDE)
    http://onlinelibrary.wiley.com/doi/10.1002/macp.201500046/full



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