Study of mechanical properties of urethane-chlorinated rubber graft copolymer system. I

✍ Scribed by K. Anbazhagan; C. Rami Reddy; K. Thomas Joseph

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 1009 KB
• Volume: 30
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1985.070300134

✦ Synopsis

The isocyanate-terminated urethane prepolymer was prepared from toluene diisocyanate and a mixture of castor oil-polypropylene glycol (PPG) (MW 2000). The chlorinated rubber (CR) graft copolymers (A and B) containing small percentage of hydroxyl groups were mixed with the urethane prepolymer in different proportions (l:l, 2:3, and 1:2), and the films were cast using these systems. Tensile strength and percent elongation were evaluated for A and B series with and without triethanolamine (TEA). Morphological characteristics of the films were also studied by using a scanning electron microscope (SEM). Deviations noticed in tensile strength values at yield as well as at break for A and B series and for the samples cured with additional TEA have been discussed.