Abstract:
The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device with a multilayered photovoltaic cell assembly and a body portion joined at an interface region.
Abstract:
A data acquisition system for a vehicle, including a plurality of sensors for sensing the value of a condition relative to the vehicle; at least one collector electronically connected with and configured to receive first data from at least one of the sensors and configured to output second data to a host controller; a host controller electronically connected with and configured to receive second data from at least one collector and configured to store the second data for later access; and, fiber optic cable means connected between the host controller and the at least one collector for carrying the second data from the at least one collector to the host controller.
Abstract:
A combinatorial method for identifying a catalyst composition for use in the homogeneous addition polymerization of an olefin monomers, said catalyst composition comprising a transition metal compound, a cocatalyst and a polymerization modifier, as well as catalyst compositions and improved olefin polymerization processes resulting therefrom.
Abstract:
A method for releasing gas from a gas hydrate without melting the gas hydrate by substituting the gas with a releasing agent that forms a more stable hydrate structure than the gas.
Abstract:
Polymer blends that exhibit good impact resistance comprise a crystalline polypropylene matrix and a partly crystalline copolymer impact modifier with a molecular weight lower than that of the matrix polymer. The matrix polymer can comprise any crystalline propylene homo- or copolymer. The impact modifying copolymers are characterized as comprising at least about 60 weight percent wt.% of units derived from propylene and, in certain embodiments, as having at least one, preferably two or more, of the following properties: i 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, ii a B-value greater than about 1.4 when the comonomer content of the copolymer is at least about 3 wt.%, iii a skewness index, Six, greater than about -1.20, iv a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer in the copolymer is increased, and v an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta Z-N catalyst.
Abstract:
A catalyst composition comprising a zirconium complex of a polyvalent aryloxyether and an alumoxane, polymerization processes employing the same, especially the continuous, solution polymerization of ethylene and one or more C 3-30 olefins or diolefins to prepare copolymers having reduced cocatalyst by-product content, are disclosed.
Abstract:
A polymerization process comprises contacting one or more olefinic comonomers in the presence of at least a high molecular weight catalyst and at least a low molecular weight catalyst in a single reactor; and effectuating the polymerization of the olefinic comonomers in the reactor to obtain an olefin polymer. Preferably, both catalysts have the ability to incorporate a substantially similar amount of comonomers in the olefin polymer. The polymers produced by the process may have a relatively higher level of long chain branching while maintaining a relatively narrow molecular weight distribution, i.e., MWD less than about 6. These interpolymers may exhibit processability similar to or better than LDPE but have physical properties similar to metallocene catalyzed polymers.
Abstract:
A process for polymerization of propylene, optionally ethylene, and further optionally one or more C 4-30 a-olefins and/or one or more conjugated or nonconjugated dienes under continuous, solution polymerization conditions to prepare a high molecular weight polymer or interpolymer, said process comprising conducting the polymerization in the presence of a catalyst composition comprising a hafnium complex of a polyvalent aryloxyether.
Abstract:
A composition for use in forming a multi-block copolymer, said copolymer containing therein two or more segments or blocks differing in chemical or physical properties, a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (A) a first metal complex olefin polymerization catalyst, (B) a second metal complex olefin polymerization catalyst capable of preparing polymers differing in chemical or physical properties from the polymer prepared by catalyst (A) under equivalent polymerization conditions, and (C) a chain shuttling agent.
Abstract:
A method of nucleating a propylene homo- or copolymer, the method comprising contacting the propylene polymer with a semi-crystalline branched or coupled polymeric nucleating agent under nucleation conditions. In one embodiment, the propylene homopolymer is characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity. In another embodiment, the copolymer is characterized as comprising at least about 60 weight percent (wt%) of units derived from propylene, and as having at least one of the following properties: (i) 13 C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), of the copolymer is at least about 3 wt%, (iii) a skewness index, Six, greater than about -1.20, (iv) a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), in the copolymer is increased, and (v) an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta (Z-N) catalyst.
Abstract translation:一种使丙烯均聚物或共聚物成核的方法,该方法包括在成核条件下将丙烯聚合物与半结晶支链或偶联的聚合物成核剂接触。 在一个实施方案中,丙烯均聚物的特征在于具有对应于约14.6和约15.7ppm的区域误差的13 C NMR峰,约等于强度的峰。 在另一个实施方案中,共聚物的特征在于包含至少约60重量%(wt%)衍生自丙烯的单元,并具有至少一个以下性质:(i)对应于区域误差的13 C NMR峰 约14.6和约15.7ppm,约等于强度的峰,(ii)当共聚单体含量(即衍生自乙烯和/或不饱和共聚单体的单元)的B值大于约1.4时,B值大于约1.4, 共聚物为至少约3重量%,(iii)偏度指数为6,大于约-1.20,(iv)具有保持基本相同的Tme的DSC曲线和随着共聚单体数量减少的Tmax,即 ,共聚物中衍生自乙烯和/或不饱和共聚单体的单元增加,和(v)比用齐格勒 - 纳塔(Ziegler-Natta)制备的可比共聚物报告更多的γ型晶体的X射线衍射图 ZN)催化剂。