The influence of comonomers on the degradation and flammability of polyacrylonitrile: Design input for a new generation of flame retardants

作者：Crook Vincent^*; Ebdon John; Hunt Barry; Joseph Paul; Wyman Paul

来源：Polymer Degradation and Stability, 2010, 95(12): 2260-2268.

DOI：10.1016/j.polymdegradstab.2010.09.008

• Polyacrylonitrile
• Styrenic and acrylic copolymers
• Thermal analyses
• LOI measurements

A series of homo- and copolymers of acrylonitrile was prepared under radical initiation in DMF solutions. The thermal and flammability characteristics of these polymers were evaluated through thermogravimetric analyses (TGA), differential scanning calorimetry (DSC), and by limiting oxygen index (LOI) measurements. The thermal degradation behaviours of the polymers were assessed primarily with a view to designing comonomers, for acrylonitrile-based polymers, bearing flame retardant moieties. Broadly speaking, in LOI tests acrylic-based comonomers were found to improve fire performance. For instance, the incorporation of methacrylic acid gave a limiting oxygen index value of 26.4 at 30.9 mol% loading, and an intumescent char was produced upon burning.

• 出版日期2010-12