ACF POLYMERS LLC - The New York-based resin-trading firm named Angela Vigorito senior vice president of international operations.
AUTOMATION PLASTICS CORP. - David Sinkhorn joined the Aurora, Ohio-based injection molder as executive vice president after purchasing an ownership interest. He most recently was with Demag Cranes & Components Corp. in Solon, Ohio.
CHELSEA BUILDING PRODUCTS INC. - The window and door profile extruder in Oakmont, Pa., named Les Lundeen Jr. its marketing and communications manager.
CROWN MOLD & MACHINE - The Streetsboro, Ohio-based mold maker, a unit of Midwest Tooling Group, named Ronald Krausman sales manager and Robert Pittman program manager.
GUARDIAN INDUSTRIES CORP. - The Auburn Hills, Mich., exterior trim maker named D. James Davis president and chief executive officer of its automotive products group.
HERBST LAZAR BELL INC. - The Chicago design and development firm named Bill Lee president. He had been executive vice president.
NATIONAL PLASTICS CENTER AND MUSEUM - The Leominster, Mass.-based, nonprofit institution named Doreen Ricker its first full-time office administrator.
PLASSEIN INTERNATIONAL - The specialty film manufacturer in Willington, Conn., named Tom Crosson vice president and general manager of facilities in Ontario, Calif.; Longview, Texas; and Thomasville, N.C. Crosson was general manager of the Ontario location.
SOCIETY OF THE PLASTICS INDUSTRY INC. - The Washington trade group inducted five members into the Pioneer Club of the Structural Plastics Division: James Hendry, a leader in the development of structural foam molding technology; John Marshall, whose achievements include forming Polycel Structural Foam Inc. in Somerville, N.J.; Clay Elliott, owner and president of Horizon Plastics Co. Ltd., a custom structural foam injection molder in Cobourg, Ontario; Frank Meisels, who spent 36 years in the mold-making industry; and Siebold Hettinga, an industry expert with a reputation for innovation in process and control technology.
TEKNOR APEX CO. - The Pawtucket, R.I., plastics supplier promoted Lynnette Mammino to vice president, from business manager for the firm's vinyl division. The company also announced the following appointments: Steve Simas to analytical associate and Phil Scadding to market manager of wire and cable. Color concentrates subsidiary TEKNOR COLOR CO., also in Pawtucket, named Stephan Pronovost marketing manager.
UNITED PLASTICS GROUP INC. - Thomas Cho was named vice president of program management for the maker of precision plastics products for the automotive, medical and electronics market. United is in Westmont, Ill.
* Polymer producer ATOFINA CHEMICALS INC. of Philadelphia named Jeff Tilley manager of its Riverview, Mich., plant. ... DuPont's Stephen Watson received a 2002 Award of Merit and the title of fellow from ASTM INTERNATIONAL, a testing group in West Conshohocken, Pa. ... Doug Muzyka was named president and chief executive officer of chemicals and packaging firm DUPONT CANADA INC. in Mississauga, Ontario. Muzyka replaces Dave Colcleugh, who will continue as chairman. ... Machinery maker VAN DORN DEMAG CORP., based in Strongsville, Ohio, named Nick Hepp parts operations manager for the firm's Molder Action Network. ... Hot-runner producer SYNVENTIVE MOLDINGS SOLUTIONS INC. of Peabody, Mass., named W. Mitch Gordon North American business manager, automotive, and John Roggenburk North American business manager, nonautomotive. ... Greg Silva was named chief financial officer of PARKINSON TECHNOLOGIES INC., a supplier of winding and web-handling machinery in Woonsocket, R.I. ... Resin distributor JLM INDUSTRIES INC. of Tampa, Fla., named Young Han vice president of its Asia-Pacific region for JLM International. ... Alan MacDiarmid was elected to the NATIONAL ACADEMY OF SCIENCES. The Dallas-based scientist won the Nobel Prize in 2000 for his part in the discovery that plastics can be made electrically conductive.