Double Heterocumulene Metathesis of Cyclic Bis(trimethylsilylamido)stannylenes and Tethered Bimetallic Bisamidinates from the Resulting α,ω-Biscarbodiimides
摘要:
Reaction of 2 equiv of tert-butylisocynnate with the cyclic bisamidostannylenes, 3a and 3b, provides the alpha,omega-biscarbodiimides, (BuN)-Bu-t=C=N(CH2)(n)N=C=N-t-Bu (2a and 2b; n = 3 and 4, respectively) in high yield. Reaction of 2b with 2 equiv of (eta(5)-C5H5)TiMe3 results in clean formation of the tethered bimetallic bisamidinate represented by meso/rac-1. The crystal structures of 3b and rac-1 are reported.
Investigation of Dynamic Intra- and Intermolecular Processes within a Tether-Length Dependent Series of Group 4 Bimetallic Initiators for Stereomodulated Degenerative Transfer Living Ziegler–Natta Propene Polymerization
作者:Wei Zhang、Lawrence R. Sita
DOI:10.1002/adsc.200700506
日期:2008.2.22
found to engage in degenerative transfer livingZiegler–Nattapolymerization involving rapid and reversible methylgroup transfer between active, (cationic) and dormant, (neutral) methyl, polymeryl zirconium centers. Under these conditions, the frequency of mr triad stereoerror incorporation into the polypropene (PP) microstructure decreases as the two metal centers are brought closer together as a
Disclosed is a release sheet including a substrate and a resin layer formed on the substrate. The resin layer includes: 100 parts by mass of an acid-modified polyolefin resin including an acid-modifying component in a content of 1 to 10% by mass; and 1 to 50 parts by mass of a crosslinking agent and/or 5 to 1000 parts by mass of polyvinyl alcohol. The crosslinking agent is composed of a carbodiimide compound and/or an oxazoline compound.
SURFACE-TREATED CARBON NANOTUBE AND RESIN COMPOSITION
申请人:Asahi Kasei Chemicals Corporation
公开号:EP2824069A1
公开(公告)日:2015-01-14
Provided is a surface-treated carbon nanotube having few surface fractures, not reducing the molecular weight of the resin to be mixed and having excellent extrudability. In the surface-treated carbon nanotube, the thermal reduction amount at 600°C in a nitrogen atmosphere is 0.2 to 40%, the surface oxygen concentration measured by X-ray photoelectron spectroscopy (XPS) is 1.5 to 40 atm% and the surface sulfur concentration is less than 0.1 atm%.
The present invention provides a mold release film including a resin layer provided on one surface of a polyester film, wherein the resin layer includes 100 parts by mass of a polypropylene-based modified polyolefin resin with the proportion of a modifying component of 1 to 10% by mass and 1 to 50 parts by mass of a cross-linking agent; the peel strength between the resin layer and a pressure-sensitive adhesive measured by bonding a rubber-based pressure-sensitive adhesive to the resin layer exceeds 3.0 N/cm; and the residual adhesion rate of a pressure-sensitive adhesive after bonding an acrylic pressure-sensitive adhesive to the resin layer is 80% or more.
There is provided a release film comprising a substrate film and a resin layer provided on at least one surface of a substrate film, wherein the resin layer comprises 100 parts by mass of an acid-modified polyolefin resin, 1 to 20 parts by mass of a crosslinking agent and 10 to 1,000 parts by mass of a polyvinyl alcohol having a saponification rate of 99% or lower.