WebMar 26, 2024 · It is generally accepted that a 10% reduction in MW of a material post processing indicates that the material has not undergone any significant level of degradation or reduction in performance properties. Therefore, a 40% shift in MFR was used as a threshold for these evaluations. WebA polymer’s molecular weight is related to that of the monomer, and the number of monomers present in the polymer molecule. The molecular weight of styrene is 104 Da. Hence, the molecular weight of polystyrene is 104n, where “n” is the styrene molecule number in the polymer chain.
Plastics – It’s All About Molecular Structure - Nxtbook Media
WebPolycarbonate, (PC), granule, 3 mm nominal granule size, weight 1000 g, additives heat stabilizer only. WebJul 15, 2024 · Polycarbonates (PC) are a group of polymers, the most common of which would probably be the polycarbonate of bisphenol A. The monomer of this PC can be … he was a one eyed one-horned lyrics
Correlating Melt Flow Index to Molecular Weight - campoly.com
WebOct 20, 2024 · The molecular weight of polycarbonate resins varies from 22,000 to 35,000 g/g mol. The glass transition temperature is between 145 – 150 °C. The presence of bulky aromatic aryl rings in the backbone of … Electronic components Polycarbonate is mainly used for electronic applications that capitalize on its collective safety features. A good electrical insulator with heat-resistant and flame-retardant properties, it is used in products associated with power systems and telecommunications hardware. It can serve as a … See more Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades … See more Phosgene route The main polycarbonate material is produced by the reaction of bisphenol A (BPA) and phosgene COCl 2. The overall reaction can be … See more Polycarbonates were first discovered in 1898 by Alfred Einhorn, a German scientist working at the University of Munich. However, after 30 years' laboratory research, this class … See more Disposal Studies have shown that at temperatures above 70 °C, and high humidity, polycarbonate will hydrolyze to bisphenol A (BPA). After about … See more Carbonate esters have planar OC(OC)2 cores, which confers rigidity. The unique O=C bond is short (1.173 Å in the depicted example), while the C-O bonds are more ether-like (the bond distances of 1.326 Å for the example depicted). Polycarbonates received their name … See more Polycarbonate is a durable material. Although it has high impact-resistance, it has low scratch-resistance. Therefore, a hard coating is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive components. The characteristics of … See more The use of polycarbonate containers for the purpose of food storage is controversial. The basis of this controversy is their hydrolysis (degradation by … See more WebPolycarbonate (PC) is a transparent thermoplastic with carbonate functional groups. Its high strength makes it resistant to impact and fracture. It is lightweight so an excellent … he was a muralist from angono rizal