Viscoelastic Properties of Organic Hybrid Materials Using Phenylbenzotriazole as Additive
Abstract:Viscoelastic properties of organic hybrid materials prepared from various types of phenylbenzotriazole compounds iFBj as additive and chlorinated polyethylene iCPEj as matrix are investigated by means of dynamic mechanical analysis. When 60.5vol% of 2-[2-hydroxy-3,5-bisi,'dimethylbenzyljphenyl]-2H-dibenzotriazole iFB990j is loaded, the maximum tan of the organic hybrid material increases 2.7 times and the temperature at maximum tanshifts more than 30, compared with those of CPE. At the temperature range of 20-35, FB990 increases both storage modulus and tan of the organic hybrid material. On the other hand, 2-i5-methyl-2-hydroxyphenyljbenzotriazole iFB100j decreases tan, since it exists in the state of crystal in the polymer matrix. Long alkyl and phenyl groups tend to prevent crystallization of FB and to increase tanof the organic hybrid material. Further, Cl group of FB improves the compatibility between additive and CPE. The study of the glass transition temperature of CPE i-17j, the organic hybrid materials and FB990 i35.5j by using differential scanning calorimeter shows that there is slightly negative interaction between the FB990 and CPE, leading to the formation of micro agglomeration of FB990 in the polymer matrix. Alumina, which is loaded to organic hybrid material as inorganic filler, increases storage modulus and loss modulus. At this time, the tanof the composite can be calculated from the tanand volume fraction of the organic hybrid material. Key Words:Organic hybrid material, Phenylbenzotriazole, Viscoelastic property, tan, Storage modulus, Loss modulus Crystallization, Glass transition temperature, Alumina