Water redistribution during the recrystallisation of amylopectin in amylopectin/gelatin blends

Authors
Farhat, IA Mousia, Z Mitchell, JR
Citation
Ia. Farhat et al., Water redistribution during the recrystallisation of amylopectin in amylopectin/gelatin blends, POLYMER, 42(10), 2001, pp. 4763-4766
Citations number
10
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
42
Issue
10
Year of publication
2001
Pages
4763 - 4766
Database
ISI
SICI code
0032-3861(200105)42:10<4763:WRDTRO>2.0.ZU;2-1
Abstract
The DMTA thermogram of 50:50:32 gelatin/amylopectin/water extrudates showed two main transitions: 24 and 52 degreesC associated with the glass transit ion temperatures (T(g)s) Of gelatin and amylopectin, respectively. After st orage (15 days, 60 degreesC), amylopectin recrystallised to the A-polymorph . This was paralleled by a decrease of the T-g of gelatin to 1.5 degreesC, which was explained in terms of water redistribution during the formation o f amylopectin crystallites. A full analysis of water partitioning in the sy stem is reported. (C) 2001 Elsevier Science Ltd. All rights reserved.