Shigeru Yao
Fukuoka University, Japan
Title: Non-solidification function of wax by the side chain crystalline block copolymer
Biography
Biography: Shigeru Yao
Abstract
Recently, we polymerized a block copolymer that was constructed of two monomers: A monomer with a long alkane side-chain (more than 10 carbon atoms) and another monomer with solvent affinity. This block shows side-chain crystallization. Thus, this block copolymer can crystallize due to its long alkane side-chain (Side-Chain Crystalline Block Copolymer: SCCBC). We found that the side chain block of the SCCBC is adsorbed on PE crystal. At this time, PE crystal and the side chain block of SCCBC are considered to form a quasi-crystalline structure. According to this, the solvent affinity block unit covers the particle and changes the particle surface easy to wet solvent. This is because, SCCBC can act as a dispersant for a concentrated PE particle dispersion. In this time, we added only 0.5 wt% of SCCBC to wax/oil mixture. Without the SCCBC, the wax/oil mixture was solidified at lower temperature, however with adding the SCCBC, the wax/oil mixture was not solidified and we could measure the viscosity and viscoelastic modulus. We also found that the crystalline structure of wax was changed with adding the SCCBC.