About twenty substitutedphenylbenzoatesincorporating a trans-4-pentylcyclohexyl moiety have been synthesised. The synthesis, liquid-crystal transition temperatures, and enthalpies of fusion are reported. The effect of variations in chainlength and central linkage on the liquid-crystal transition temperatures is discussed.
Polymernetworks with high-density molecular springs were developed by employing anion-coordination foldamers as monomer. This endows the materials with excellent energy dissipation and elasticity through folding and unfolding of foldamer. With increasing number of repeating units in the foldamer, the corresponding polymernetwork shows better mechanical performance as well as shape memory feature
Polar group-containing olefin copolymer, process for preparing the same, thermoplastic resin composition containing the copolymer and uses thereof
申请人:Mitsui Chemicals, Inc.
公开号:EP1734061B1
公开(公告)日:2010-04-07
Polar group-containing olefin copolymer, process for preparing the same, thermoplastic resin composition containing the copolymer, and uses thereof
申请人:Imuta Junichi
公开号:US20090137757A1
公开(公告)日:2009-05-28
A polar group-containing olefin copolymer having excellent adhesion properties to metals or polar resins and excellent compatibility therewith, a process for preparing the copolymer, a thermoplastic resin composition containing the copolymer, and uses thereof. The polar group-containing olefin copolymer comprises a constituent unit derived from an □-olefin of 2 to 20 carbon atoms, and a constituent unit derived from a straight-chain, branched or cyclic polar group-containing monomer having at the end a polar group such as a hydroxyl group or an epoxy group and/or a constituent unit derived from a macromonomer having at the end a polymer segment obtained by anionic polymerization, ring-opening polymerization or polycondensation. The polar group-containing olefin copolymer can be prepared by polymerizing the α-olefin with the polar group-containing monomer and/or the macromonomer in the presence of a metallocene catalyst. The polar group-containing olefin copolymer and the thermoplastic resin composition containing the copolymer are used for films, sheets, modifiers, building/civil engineering materials, automobile exterior trim, electric/electronic parts, coating bases, compatibilizing agents, etc.