Thermal studies of copolymers of acrylonitrile with haloalkyl acrylates and methacrylates

✍ Scribed by P. Bajaj; M. Padmanaban

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 303 KB
• Volume: 20
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(84)90035-1

✦ Synopsis

Thermal behaviour of copolymers of acrylonitrile containing 2-15 mol% of halogen substituted alkyl acrylates and methacrylates was studied by differential scanning calorimetry and thermogravimetry (TG) under nitrogen atmosphere. It was observed that incorporation of haloalkyl acrylates or methacrylates in polyacrylonitrile decreases the second order transition and does not affect the extent of nitrile oligomerization but the oligomerization is delayed. TG analysis of the copolymers revealed that the threshold decomposition temperatures of these copolymers are /> 260 ° as compared to 248 ° for pure polyacrylonitrile. The residue at 850 ° was less for the copolymers and it further decreases with increase in the comonomer concentration.