tailieunhanh - Materials Handbook 15th ed - G. Brady_ H. Clauser_ J. Vaccari (McGraw-Hill_ 2002) Episode 10

Tham khảo tài liệu 'materials handbook 15th ed - g. brady_ h. clauser_ j. vaccari (mcgraw-hill_ 2002) episode 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 720 PLASTIC ALLOYS AND BLENDS species is also called buttonwood and buttonball. It is a yellowish compact wood with a fine open grain. The density is about 40 lb ft3 641 kg m3 . It resembles maple and gives a beautiful grain when quartered. It is employed in cabinetwork. PLASTIC ALLOYS AND BLENDS. Alloys consisting of two thermoplastics compounded into a single resin. The two polymers must be meltcompatible. Some polymers are naturally compatible others require the use of compatibilizing agents. The purpose of alloying polymers is to achieve a combination of properties not available in any single resin. Acrylonitrile butadiene styrene ABS is a common alloy ingredient alloys including polycarbonate-ABS PC-ABS ABS-polyurethane ABS-PUR ABS-nylon ABS-polysulfone and ABS-polyvinyl chloride ABS-PVC . Besides PC-ABS there are polycarbonate-polybutylene terephthalate PC-PBT polycar-bonate-acrylonitrile styrene acrylate PC-ASA and polycarbonate acrylic PC-Acrylic and polyetherimide-polycarbonate PEI-PC alloys. And besides ABS-PVC there are polyvinyl chloride-acrylic polyvinyl chloride-chlorinated polyethylene PVC-CPE and acrylic-polyvinyl chloride alloys. There are also polyethylene alloys polyphenylene oxide-polystyrene and polyphenylene oxide-polybutylene terephthalate PPO-PBT alloys. PC-ABS alloys extend the exceptionally high impact strength of carbonate plastics to section thicknesses over in cm . Tradenames of PC-ABS alloys include Cycoloy of General Electric Plastics Pulse of Dow Plastics Bayblend of Bayer. and Celstran of Polymer Composites Inc. Cycoloy C2950 HF features a 30 greater flow rate than Cycoloy C2950 and a UL94 V-O flame retardance at a thickness of in mm and a UL94 5VB at in mm . Cycoloy LG9000 is a low-gloss or matte-finish grade for unpainted interior auto parts. It provides 60 less gloss than standard grades and has a tensile strength of 7 900 lb in2 54 MPa a flexural strength of 12 300 lb in2 85 MPa a flexural modulus .