摘要:
A process for the polymerization of olefinic hydrocarbons is carried out in the presence of a catalyst comprising a catalyst component derived from reacting a compound of the formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n, a compound of the formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.z-m, an organocyclic compound having two or more conjugated double bonds and a carrier of inorganic or polymeric material, and a modified organoaluminum compound having Al--O--Al bonds, the resulting polyolefins having a relatively wide molecular weight distribution, a relatively narrow composition distribution and increased bulk density.
摘要:
An electroactive polymer is obtained by doping a copolymer represented by the following general formula (I): ##STR1## wherein R.sup.1 is hydrogen or a hydrocarbon residue having 1 to 20 carbon atoms; R.sup.2 is hydrogen, a hydrocarbon residue having 1 to 20 carbon atoms, furyl, pyridyl, nitrophenyl, chlorophenyl, or methoxyphenyl; l is an integer not smaller than 2; m is an integer not smaller than 1; and n is an integer not smaller than 2.
摘要:
The deformation sensitive electroconductive knitted or woven fabric of the present invention is a knitted or woven fabric, which can be changed in electroconductivity at the deformed portion when the deformation of stretch or compression is applied thereon by maintaining in the certain ratio of the number of electrically insulating portions to the number of electroconductive portions at the intertwined portions of the fibers and/or the portions between the intertwined portions of the fibers. By using this knitted or woven fabric directly or a deformation sensitive electroconductive sheet having an elastomer laminated on at least one surface of the knitted or woven fabric, it can be utilized as an stretch sensitive electroconductive device or pressure sensitive electroconductive device provided electrodes capable of detecting the changes in electroconductivity corresponding to deformations as electrical characteristics such as electrical resistance. This deformation sensitive electroconductive device is more excellent in measurement of great deformations and durability in repeated uses as compared with the pressure sensitive electroconductive device using the pressure sensitive electroconductive elastomer sheet mixed with electroconductive fillers which has been used in the prior art.
摘要:
An image forming apparatus comprises: a developing device having an outlet from which a two-component developer is partially discharged while the two-component developer is conveyed; a hopper to which (i) a first cartridge containing a first developer including carriers and (ii) a second cartridge containing a second developer including toner and not carriers are attachable, and operable, when the first cartridge is attached thereto, to supply the first developer to the developing device, and when the second cartridge is attached thereto, to supply the second developer to the developing device; and a switching part operable, when the first developer is supplied, to switch the developing device to a first state in which the two-component developer is partially discharged from the outlet, and when the second developer is supplied, to switch the developing device to a second state in which the two-component developer is not discharged from the outlet.
摘要:
The present invention provides a warp knitted fabric containing a latent crimp fiber but no elastic fiber, and showing a stretchability of 60% or more in both the warp and weft directions, and a residual strain at 60% elongation recovery of 15% or less in both the warp and weft directions. The warp knitted fabric of the present invention shows little lowering of the stretchable functions during dyeing at high temperature, repeated washing, repeated stretching, or the like treatment, and is excellent in elongation recovery due to the high stretchability, surface smoothness and shape retention.
摘要:
A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q and a second compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing high molecular weight, wide distribution thereof and other desirable qualities in the polymer product.
摘要:
A catalyst component is disclosed for use in the homo-or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me.sup.1 (OR.sup.1).sub.p R.sup.2.sub.q X.sup.1.sub.4-p-q and a second compound which is an organocyclic compound having two or more conjugated double bonds. A process is also disclosed for the production of hydrocarbon polymers in which the above catalyst component is combined with a modified organoaluminum compound to form a catalyst composition capable of providing high molecular weight, wide distribution thereof and other desirable qualities in the polymer product.
摘要:
A process for the polymerization of olefinic hydrocarbons is carried out in the presence of a catalyst comprising a catalyst component derived from reacting a compound of the formula Me.sup.1 R.sup.1.sub.n X.sup.1.sub.4-n, a compound of the formula Me.sup.2 R.sup.2.sub.m X.sup.2.sub.z-m, an organocyclic compound having two or more conjugated double bonds and a carrier of inorganic or polymeric material, and a modified organoaluminum compound having Al--O--Al bonds, the resulting polyolefins having a relatively wide molecular weight distribution, a relatively narrow composition distribution and increased bulk density.
摘要:
Provided is a copolymer having a repeating unit represented by the general formula ##STR1## wherein Ar represents ##STR2## wherein R.sup.1 represents hydrogen or a hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 represents hydrogen, a hydrocarbon group having 1 to 20 carbon atoms, furyl, pyridyl, chlorophenyl, nitrophenyl or methoxyphenyl, n is 1 or more and an electroactive polymer obtained by doping the above copolymer.