摘要:
Macromers of the general formula (3) are prepared by reacting a silane compound of the general formula (1) and a polyethylene glycol monoalkyl ether of the general formula (2). R 1 : H, or C 1 -C 5 alkyl group; R 2 : H, C 1 -C 5 alkyl group, or (OCH 2 CH 2 ) p OR 4 ; R 2 same as R 2 or Cl; R 3 : C 1 -C 10 alkyl; R 4 : C 1 -C 10 alkyl; t: integer of from 1 to 10 (1≦ℓ≦10); m: integer of from 1 to 30 (1≦m≦30); and p: integer of from 1 to 30 (1≦p≦30). Useful comb-like polymers can be obtained from the macromers by polymerization in a solvent in the presence of radical polymerization initiators.
摘要:
A thermoplastic elastomer composition prepared by partially crosslinking a composition comprising the following components (A), (B) and (C): (A) 30-70 parts by weight of an ethylene/α-olefin copolymer prepared by copolymerizing ethylene and an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid component and an organoaluminum compound which solid component contains at least magnesium and titanium, said ethylene/α-olefin copolymer having the following properties (I) to (IV): (I) Melt index 0.01-100 g/10 min (II) Density 0.860-0.910 g/cm³ (III) Maximum peak temperature as measured according to a differential scanning calorimetry (DSC) not lower than 100°C (IV) Insolubles in boiling n-hexane not less than 10 wt.% (B) 70-30 parts by weight of a propylene polymer; and (C) 70-200 parts by weight, based on 100 parts by weight of the components (A) and (B), of an ethylene/α-olefin copolymer rubber.
摘要:
A polyphenylene ether resin composition comprising as the major components:
(a) 100 parts by weight of polyphenylene ether resin, and (b) 1 - 30 parts by weight of a hydrocarbon resin which has a softening point of 140 - 180 o C and a ratio of weight-average molecular weight to number-average molecular weight M w /M n of 2.0 or less, and is prepared by polymerizing a raw material oil of hydrocarbon in which a total content of indene and methylindene is 80% by weight or more by the use of a Friedel-Crafts type catalyst.
摘要:
A process for fabricating a carbon/carbon fiber composite characterized in that one or more kinds of fibers selected from the group consisting of a pitch fiber obtained by spinning a carbonaceous pitch, an infusiblized fiber obtained by subjecting the pitch fiber to an infusiblizing treatment, and a pre-carbonized fiber obtained by subjecting the infusiblized fiber to a pre-carbonizing fiber at 400° to 800°C in an inert gas atmosphere, are woven, laminated or mix-pulverized together with a pitch-based carbon fiber, and then carbonized under the application of pressure or under pressing.
摘要:
A random copolymer comprises recurring units each having the formula of; wherein R¹ to R¹⁰ stand for a hydrogen atom or an alkyl group with or without R⁵ being bonded to R⁶ or R¹⁰ via an alkylene group having 1 to 3 carbon atoms. The random copolymer contains 50 to 90 mol % of ethylene. The random copolymer has an intrinsic viscosity [η] of 0.3 to 10 dl/g measured in decalin at 30°C.
摘要:
A process for preparing an ultra-high molecular weight polyethylene by the polymerization of ethylene using a catalyst comprising a solid catalyst component and an organometallic compound, characterized in that said solid catalyst component is a product obtained by contacting the following [A] and [B] together:
[A] the reaction product of a magnesium dihalide and a titanium compound represented by the general formula Ti(OR)₄ wherein R is a hydrocarbon group having 1 to 20 carbon atoms; [B] the reaction product of an aluminum trihalide and a silicon compound represented by the general formula Si(OR′)₄ wherein R′ is a hydrocarbon group having 1 to 20 carbon atoms.
摘要翻译:一种通过使用包含固体催化剂组分和有机金属化合物的催化剂通过乙烯聚合制备超高分子量聚乙烯的方法,其特征在于所述固体催化剂组分是通过使以下[A]和[B ] [A]二卤化镁与由通式Ti(OR)4表示的钛化合物的反应产物,其中R是具有1至20个碳原子的烃基; [B]三卤化铝与由通式Si(OR min)4表示的硅化合物的反应产物,其中R min是具有1至20个碳原子的烃基。 p
摘要:
A modified olefinic polymer is obtained by fluorinating an ethylene/α-olefin copolymer having the following properties (i) to (iv), said ethylene/α-olefin copolymer being prepared by copolymerizing ethylene and an α-olefin having 3 to 12 carbon atoms in the presence of a catalyst comprising a solid catalyst component and an organoaluminum compound, said solid catalyst component containing at least magnesium and titanium: (i) Melt index: 0.01 - 100 g/10 min (ii) Density: 0.860 - 0.910 g/cm³ (iii) Maximum peak temperature (Tm) as measured according to a differential scanning calorimetry (DSC) should be not lower than 100°C. (iv) Insolubles in boiling n-hexane should be not less than 10% by weight.