| 摘要 |
<p>Disclosed is a new styrenic copolymer comprising: (a) repeating styrene units of general formula (I), wherein R<1> represents a hydrogen or halogen atom, or a hydrocarbon group having 20 or less carbon atoms and n is an integer of 1 to 3, provided that R<1> groups may be the same or different from each other when n is 2 or 3, and (b) repeating olefin units of general formula (II), wherein R<2> represents a hydrogen atom or a saturated hydrocarbon group having 20 or less carbon atoms, or (c) repeating diene units, wherein the proportion of the repeating olefin units (b) or diene units (c) is 0.1 to 99.9 % by weight. The copolymer has a limiting viscosity of 0.07 to 20 dl/g as measured in 1,2,4-trichlorobenzene at 135 DEG C and the stereoregularity of the chain of the repeating styrene units is highly syndiotactic. It is excellent in the resistance to heat, chemicals and so forth and capable of low-temperature injection molding. It has also a good compatibility with other resins.</p> |
