TY - GEN
T1 - Evolution of monoclinic and orthorhombic phases during the deformation of olefin block copolymers
AU - Zuo, Feng
AU - Mao, Yimin
AU - Hsiao, Benjamin S.
AU - Chen, Hongyu
AU - Chiu, Debbie
AU - Lai, Shih Yaw
PY - 2009
Y1 - 2009
N2 - The novel catalytic system, using two catalysts with substantially different monomer selectivity regarding ethylene and a-olefin, and a chain shuttling agent, can produce a new class of olefin block copolymer. The olefin block copolymers, consisting of hard segments with high density and soft segments with low density, exhibit different properties depending on the crystal structure, morphology, orientation, comonomer content, block length and distribution etc. The present study investigated the phase behavior of olefin block copolymers with different octane comonomer content in the soft segment during uniaxial deformation using in-situ synchrotron X-ray. The results indicated that the monoclinic phase was formed with the expense of orthorhombic phase during deformation. The octane comonomer content determined the rate of formation or destruction process; where higher the octane comonomer content in the soft segment, faster and more monoclinic crystals were formed.
AB - The novel catalytic system, using two catalysts with substantially different monomer selectivity regarding ethylene and a-olefin, and a chain shuttling agent, can produce a new class of olefin block copolymer. The olefin block copolymers, consisting of hard segments with high density and soft segments with low density, exhibit different properties depending on the crystal structure, morphology, orientation, comonomer content, block length and distribution etc. The present study investigated the phase behavior of olefin block copolymers with different octane comonomer content in the soft segment during uniaxial deformation using in-situ synchrotron X-ray. The results indicated that the monoclinic phase was formed with the expense of orthorhombic phase during deformation. The octane comonomer content determined the rate of formation or destruction process; where higher the octane comonomer content in the soft segment, faster and more monoclinic crystals were formed.
UR - https://www.scopus.com/pages/publications/78649514129
M3 - Conference contribution
AN - SCOPUS:78649514129
SN - 9780841224414
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Y2 - 22 March 2009 through 26 March 2009
ER -