摘要:
A super-tough polymeric composition comprising an engineering thermoplastic and a modified radial polymer. The engineering thermoplastic is selected from the group consisting of polyamides, thermoplastic polyesters, polyphenylene ether resins, polyarylene sulfide resins, polysulfone and the like. The modified radial polymer is modified by grafting a compound containing a carboxylic acid or carboxylic acid derivative group. The modified, radial polymer has from about 3 to about 50 arms, as determined using light scattering techniques and the arms will be olefin polymers. The polymer compositions will yield shaped articles which fail ductilely when tested using ASTM procedure D-256 at room temperature and some at -20.degree. F.
摘要:
Novel, selectively hyrogenated block compolymers, which compolymers comprise at least one block of polymerized alkyl methacrylate and one block of polymerized conjugated alkadiene, provide improved dispersant properties and viscosity index improvement to hydrocarbon lubricating oils.
摘要:
Unsaturated hydrocarbon polymers are hydrogenated in the presence of a catalyst obtained by combining a Group VIII-A metal alkoxide or carboxylate and an alkyl or hydride of a metal selected from Groups I-A, II-A and III-B and then functionalized by contacting the hydrogenated polymer with a functionalizing agent before the hydrogenation catalyst is quenched or otherwise deactivated. The hydrogenation is, generally, accomplished at relatively mild conditions to avoid degradation of the polymer and, in the case of unsaturated copolymers comprising aromatic unsaturation, to avoid any significant hydrogenation of the aromatic unsaturation. Generally, the hydrogen partial pressure employed will be below about 1000 psig and the hydrogenation temperature will be below about 125.degree. C. The hydrogenated polymer may be functionalized by reaction with functionalizing agent select from the group carbon dioxide, ethylene oxide, aldehydes, ketones, carboxylic acid salts and esters, halides, epoxides, sulfur, boron alkoxides, isocyanates, various silicon compounds and the like. Carbon dioxide is a particularly preferred functionalizing agent since the thus functionalized polymer is useful as a modifier in sheet and bulk molding compositions and readily responds to the presence of thickening agents.
摘要:
A thermoplastic polymer and an article of manufacture consisting essentially of this polymer are described herein which possess excellent mechanical properties at both room and elevated temperatures. The polymer is obtained by modifying a block copolymer composed of a conjugated diene compound and an alkenyl arene compound. The block copolymer is first selectively hydrogenated and thereafter modified by grafting carboxyl containing functional groups primarily in the alkenyl arene block via metalation. The mechanical properties may be varied and controlled by varying the degree of functionalization (amount of carboxyl groups), and the degree of neutralization of the carboxyl groups from an acid to a metal carboxylate salt.
摘要:
Carbon dioxide is removed from a gaseous stream by contacting the stream with an adsorbent prepared by impregnating a porous aluminum with an alkali metal or alkaline earth metal oxide or salt decomposable upon calcination and subsequently calcining the impregnated alumina at about 350.degree. C.-700.degree. C.
摘要:
Solid copolymers of butene-1 and 4-vinylcyclohexene prepared by copolymerizing the monomers in the presence of a titanium halide coordination catalyst have an unobvious balance of properties including a broader molecular weight distribution, shorter crystallization half-time, greater isotacticity and greater crystallinity than butene-1 homopolymers prepared with identical catalysts.
摘要:
Described herein are modified sulfonated block copolymers which comprise at least two polymer end blocks A and at least one polymer interior block B, wherein each A block contains essentially no sulfonic acid or sulfonate functional groups and each B block comprises sulfonation susceptible monomer units and, based on the number of the sulfonation susceptible monomer units, from about 10 to about 100 mol % of a functional group of formula (I) —SO2—NR1R2 (I) or of a salt thereof, methods of making them as well as methods of using them, e.g., as membrane materials for electrically or osmotically driven applications.
摘要:
Described herein are modified sulfonated block copolymers which comprise at least two polymer end blocks A and at least one polymer interior block B, wherein each A block contains essentially no sulfonic acid or sulfonate functional groups and each B block comprises sulfonation susceptible monomer units and, based on the number of the sulfonation susceptible monomer units, from about 10 to about 100 mol % of a functional group of formula (I) —SO2—NR1R2 (I) or of a salt thereof, methods of making them as well as methods of using them, e.g., as membrane materials for electrically or osmotically driven applications.
摘要翻译:本文描述的是改性的磺化嵌段共聚物,其包含至少两个聚合物端嵌段A和至少一个聚合物内部嵌段B,其中每个A嵌段基本上不含磺酸或磺酸盐官能团,并且每个B嵌段包含磺化敏感的单体单元和基于 对于磺化易感单体单元的数量,约10至约100摩尔%的式(I)-SO 2 -NR 1 R 2(I)的官能团或其盐,制备它们的方法以及使用方法 它们例如用作用于电驱动或渗透驱动应用的膜材料。
摘要:
The present invention provides a block copolymer composition and method of making the same having the structures (A2-B)n-X-(A1) or (A2-B2)n-X-(B1A1), where A1 and A2 are each a polymer block of a monoalkenyl arene and B, B1, and B2 are each a polymer block of one or more conjugated dienes or a hydrogenated diene polymer, n is an integer from 2 to 30 and X is the residue of a coupling agent.
摘要:
The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and controlled distribution blocks of mono alkenyl arenes and conjugated dienes. The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.