An ammunition article is provided which comprises a casing and a cap wherein the casing is formed from a polymeric material that has a room temperature notched Izod impact value greater than about 10 ft lbs/in and then has a ratio of notched Izod impact value at room temperature to notch Izod impact
An ammunition article is provided which comprises a casing and a cap wherein the casing is formed from a polymeric material that has a room temperature notched Izod impact value greater than about 10 ft lbs/in and then has a ratio of notched Izod impact value at room temperature to notch Izod impact value at about −40° C. of less than about 4.
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1. A blend comprising a polyphenylsulfone and a rigid-rod polyphenylene copolymer, wherein a room temperature notched Izod impact strength of the polyphenylsulfone is greater than about 10 ft-lb/in, as measured by ASTM D256-00 anda ratio of notched Izod impact strength at room temperature to notched
1. A blend comprising a polyphenylsulfone and a rigid-rod polyphenylene copolymer, wherein a room temperature notched Izod impact strength of the polyphenylsulfone is greater than about 10 ft-lb/in, as measured by ASTM D256-00 anda ratio of notched Izod impact strength at room temperature to notched Izod impact strength at about −40° C. of the polyphenylsulfone is less than about 4; andthe rigid-rod polyphenylene copolymer is a copolymer of formula (1): (—Ar—/—Y—)n (1)whereinn is an integer of 4 or larger,a content of —Ar— in the rigid-rod copolymer is at least 0.1 mol %, and—Ar— consists of arylene repeat units of formula (2) and formula (3): a number average of the arylene repeat units (2) and (3) of —Ar— is greater than 4,a number average of para-arylene repeat units in formula (3) is between 1 and about 8;a number average of meta-arylene repeat units in formula (2) is greater than 1;x of each repeating phenylene unit of formula (2) and formula (3) is independently an integer from 0 to 4, with the proviso that at least 1 of every 100 repeat units has a pendent side group A; andA of each phenylene unit is independently selected from the group consisting of —F, —CN, —CHO, —COR, —CR═NR′, —OR, —SR, —SO2R, —OCOR, —CO2R, —NRR′, —N═CRR′, —NRCOR′, —CONRR′, and R, wherein R and R′ are each independently selected from the group consisting of H, alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl, and optionally R and R′ if present together may form a bridging group;Y is nil or at least one divalent group selected from the group consisting of —Z—, —Z-Ph-, and -Ph-Z-Ph-, wherein Z is a divalent group selected from the group consisting of —O—, —S—, —NR—, —O(CO)—, —O(CO2)—, —(CO)NH(CO)—, —NR(CO)—, phthalimide, pyromellitimide, —CO—, —SO—, —SO2—, —P(O)R—, —CH2—, —CF2—, and —CRR′— and wherein Ph is ortho, meta or para-phenylene. 2. The blend of claim 1, wherein A is selected from the group consisting of alkyl, aryl, alkyl ketone, aryl ketone, alkoxy, aryloxy, alkylester, arylester, alkylamide and arylamide. 3. The blend of claim 1, wherein A is selected from the group consisting of acetyl, benzoyl, carbomethoxy, formyl, phenoxy, phenoxybenzoyl, and phenyl. 4. The blend of claim 1, which consists of the polyphenylsulfone and the rigid-rod polyphenylene copolymer. 5. The blend of claim 1, which further comprises an additive selected from the group consisting of plasticizers, lubricants, molding agents, fillers, thermooxidative stabilizers, flame-retardants, coloring agents, compatibilizers, impact modifiers, release agents, reinforcing fibers, and combinations thereof. 6. The blend of claim 1, wherein an amount of the rigid-rod polyphenylene copolymer is about 50% by weight or less. 7. The blend of claim 6, wherein the amount of the rigid-rod polyphenylene copolymer is from about 5% by weight to about 50% by weight. 8. The blend of claim 6, wherein the amount of the rigid-rod polyphenylene copolymer is from about 5% by weight to about 25% by weight. 9. The blend of claim 1, wherein the blend has a room temperature notched Izod impact strength greater than about 10 ft-lb/in (as measured by ASTM D256-00) and a ratio of notched Izod impact strength at room temperature to notched Izod impact strength at about −40° C. of less than about 4.
Gagne Robert R. (Pasadena CA) Marrocco ; III Matthew Louis (Santa Ana CA) Trimmer Mark Steven (Pasadena CA) Hendricks Neil H. (Brea CA), Macromonomers having reactive end groups.
Gagne Robert R. (Pasadena CA) Marrocco ; III Matthew L. (Santa Ana CA) Trimmer Mark S. (Pasadena CA) Hendricks Neil H. (Brea CA), Macromonomers having reactive side groups.
Marrocco ; III Matthew Louis (Santa Ana CA) Gagne Robert R. (Pasadena CA) Trimmer Mark Steven (Monrovia CA) Wang Ying (San Dimas CA), Rigid-rod polymers.
Leshner Ervin (Cherry Hill NJ) Donnard Reed E. (Huntingdon Valley PA), Stress modulator ring and microgrooved base for an ammunition cartridge having a plastic case.
McGrail Patrick T. (Saltburn GB2) Sefton Mark S. (Northallerton GB2) Peacock Judith A. (Middlesbrough AZ GB2) Almen Gregory R. (Mesa AZ) Wilkinson Steven P. (Keighley GB2), Thermoset and polyarylsulfone resin system that forms an interpenetrating network.
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