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Title: Optimisation of the effect of colemanite as a new synergistic agent in an intumescent system
Authors: Atikler, Ulaş
Demir, Hasan
Tokatlı, Figen
Tıhmınlıoğlu, Funda
Balköse, Devrim
Ülkü, Semra
Keywords: Colemanite
D-optimal mixture design
Intumescent system
Ammonium compounds
Issue Date: Jul-2006
Publisher: Elsevier Ltd.
Source: Atikler, U., Demir, H., Tokatlı, F., Tıhmınlıoǧlu, F., Balköse, D., and Ülkü, S. (2006). Optimisation of the effect of colemanite as a new synergistic agent in an intumescent system. Polymer Degradation and Stability, 91(7), 1673-1573. doi:10.1016/j.polymdegradstab.2005.09.017
Abstract: An intumescent system including ammonium polyphosphate (APP) as an acid source and blowing agent, pentaerythritol (PER) as a carbonific agent and colemanite as a synergistic agent is used to enhance flame retardancy of polypropylene (FR-PP). In order to investigate the synergism between colemanite and the flame retardant materials (APP and PER), D-optimal mixture design was employed. The limiting oxygen index (LOI) and amount of residue (AoR) were accepted as response 1 and response 2, respectively. Applying D-optimal strategy, 18 experiments were performed. Filler content was fixed at 30 wt% of total amounts of flame retardant PP composites. Constraints were determined according to the ratio of APP/PER ranging between 1 and 3. Statistical analysis of the cubic model revealed that lack of fit (LoF) was not significant for the cubic and linear model for both responses. The model suggested an optimum composite formulation with concentration levels 65% of APP, 28% of PER and 7% of colemanite that gives an LOI of 40.3. The experimental LOI and AoR of optimum formulation were achieved as 39.3 and 21.4 with 2.5% and 2.2% errors, respectively.
ISSN: 0141-3910
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Food Engineering / Gıda Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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