Utilizing the SSA technique for assessing the quality of SCB distribution inLLDPE

The recently developed Successive Self -Nucleation/Annealing (SSA) technique has been used tocharacterize different polyolefin types. LLDPE copolymers were studied by SSA. The SSA techniquecan provide a qualitative insight into the chain branching distribution of a polyolefin copolymer withbetter resolution than SC and in a much simpler and faster way than Temperature Rising ElutionFractionation (TREF). The ability of the SSA technique to induce molecular segregation duringcrystallization and annealing proved to be very useful to characterize functionalized polyolefins. Inthis work, two grades of LLDPE were compared in terms of their mechanical and optical properties.The SSA technique was used to determine the short chain branching (SCB) distribution, which isrelated to both mechanical and optical properties.

کلیدواژه ها:

POLYETHYLENE ، LLDPE ، DSC ، SSA ، SCB