Variation of benzyl anions in MgAl-layered double hydroxides: Fire and thermal properties in PMMA

Authors

Calistor Nyambo, Marquette UniversityFollow
Dan Chen, Hunan Normal UniversityFollow
Shengpei Shu, Hunan Normal University
Charles A. Wilkie, Marquette UniversityFollow

Document Type

Article

Publication Date

4-2009

Source Publication

Polymer Degradation and Stability

Source ISSN

0141-3910

Abstract

Magnesium aluminum layered double hydroxides (MgAl-LDHs) intercalated with a range of benzyl anions were prepared using the coprecipitation method. The benzyl anions differ in functionality (i.e. carboxylate, sulfonate, and phosphonate) and presence or absence of an amino substituent. Various methods for preparing LDHs (i.e. ion exchange, coprecipitation and rehydration of the calcined LDH methods) have been compared with the MgAl-benzene phosphonate and their effect on fire and thermal properties was studied. After characterization, the MgAl-LDHs were melt-blended with poly(methyl methacrylate) (PMMA) at loadings of 3 and 10% by weight to prepare composites. Characterization of the LDHs and the PMMA composites was performed using FTIR, XRD, TGA, transmission electron microscopy (TEM) and cone calorimetry. FTIR and XRD analyses confirmed the presence of the charge balancing benzyl anions in the galleries of the MgAl-LDHs. Improvements in fire and thermal properties of the PMMA composites were observed. The cone calorimeter revealed that the addition of 10% MgAl-LDHs reduces the peak heat release rate by more than 30%.

Comments

Accepted version. Polymer Degradation and Stability, Vol. 94, No. 4 (April 2009): 496-505. DOI. © 2009 Elsevier Ltd. Used with permission.

Recommended Citation

Nyambo, Calistor; Chen, Dan; Shu, Shengpei; and Wilkie, Charles A., "Variation of benzyl anions in MgAl-layered double hydroxides: Fire and thermal properties in PMMA" (2009). Chemistry Faculty Research and Publications. 89.
https://epublications.marquette.edu/chem_fac/89