title: Effect of different polyol-based plasticizers on thermal properties of polyvinyl alcohol:starch blends.
abstract: A series of gelatinized polyvinyl alcohol (PVA):starch blends were prepared with various polyol-based plasticizers in 5 wt%, 15 wt% and 25 wt% ratios via solution casting method. The obtained films were analyzed by Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Remarkable changes have been observed in glass-transition temperature (Tg) and thermal stability of the samples containing varying concentrations of different plasticizers and they have been discussed in detail with respect to the conducted thermal and chemical analyses. The observed order of Tg point depression of the samples containing 15 wt% plasticizer is 1,4-butanediol - 1,2,6-hexanetriol--pentaerythriyol--xylitol--mannitol, which is similar to the sequence of the thermal stability changes of the samples.
authors.affiliation: Chemical Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey. Electronic address: aydinal@itu.edu.tr.
authors.forename: Ahmet Alper
authors.initials: AA
authors.lastname: Aydın
authors.affiliation: Faculty of Gardening and Food Technology, University of Applied Sciences Weihenstephan-Triesdorf, Am Staudengarten 11, D-85350 Freising, Germany.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Ilberg
mesh_terms: D002072:Butylene Glycols / Q000737:chemistry; D058105:Polymerization; D011108:Polymers / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D002072:Butylene Glycols; D011108:Polymers; C024617:polyol; C039681:1,4-butanediol; D011142:Polyvinyl Alcohol; D013213:Starch
keywords: 1,2,6-Hexanetriol (PubChem CID: 7823); 1,4-Butanediol (PubChem CID: 8064); Corn starch (PubChem CID: 24836924); Glass transition; Mannitol (PubChem CID: 6251); Pentaerythritol (PubChem CID: 8285); Plasticizer; Polyol; Polyvinyl alcohol; Polyvinyl alcohol (PubChem CID: 11119); Starch; Thermal properties; Xylitol (PubChem CID: 6912)