Solution: Option (i) is the answer. The usual precursor for graphite is polyacrylonitrile, better known by its trade name—Orlon. Zeigler – Natta catalyst is used in making (a) LDPE (b) HDPE (c) Polystyrene (d) PMMA. In this study, PAN/polyimide (PI) composite membrane is prepared by … It degrades before melting. We are one of the leading manufacturer & supplier of China Supplier Marine Hardware Swivel Type Chain Stopper Type A For Sale in China. A similar approach is used to prepare fibers of silicon carbide using an organosilicon precursor such as polydimethylsilane {[–(CH 3) 2 Si–] n}. Contents; Search; Polyacrylonitrile Membrane. These are consecutively used in hydrogen storage, EMI shielding, electrochemistry, separation processes. Answer: b Explaination: artificial wool, used for making carpets etc. Solution: Option (C) is the answer. In terms of its molecular structure, it consists of a vinyl group linked to a nitrile.It is an important monomer for the manufacture of useful plastics such as polyacrylonitrile. The commercial name of polyacrylonitrile is _____. It is hard, transparent and better than glass in optical clarity. Which of the following polymer is biodegradable? Polyacrylonitrile-Derived Organogel Xiwei Guo, Changgeng Zhang, Lei Shi,Email:Qi Zhang, and He Zhu* School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, Shenzhen, Guangdong, China. Name: National Institute of Advanced Industrial Science and Technology : Country / Territory: Japan: IP right(s): Patents: Date of publication: July 31, 2012: Last update: October 15, 2012: Go to: Research & development; Invention; IP management; Patent; Licensing; Commercialization; Business results; Agency of Industrial Science and Technology, Japan. Click here to get an answer to your question ️ The commercial name of polyacrylonitrile is ..... (a) dacron (b) orlon (acrilan) (c) PVC (d) bakelite 1. Polyacrylonitrile-based pre-oxidized fibers with improved thermal stability, flame retardant, and mechanical properties were made from the pristine polyacrylonitrile fibers through chemical pretreatment followed by pre-oxidation in air. i m doing my MBA through SMU KSA and not rech to specialztion yet my 2nd sem xam not held. The acrylic fiber industry experienced a spectacular growth in the 1950s with at least 18 additional companies, including … 18. A method for preparing polymer for PAN precursor, by copolymerizing the water phase suspend using ammonium persulphate-ammonium sulfite or ammonium bisulfite as a primosome, is disclosed. Join now. Name: 2-Propenenitrile Synonyms: AN; cyanoethylene; propenenitrile; ... A second commercial route to acrylonitrile was the catalytic addition of hydrogen cyanide to acetylene. Acrylonitrile and polyacrylonitrile were synthesized in 1893–94 by the French chemist Moreau, ... the commercial development of acrylic fibers began with rapid growth. The commercial name of polyacrylonitrile is _____. Cigarette smoking has various direct and indirect concerns regarding the health of active and passive smokers. It has a pungent odor of garlic or onions. Solution: Option (ii) is the answer. Search SpringerLink. Answer/Explanation. For the formation of terylene, the number of moles of ethylene glycol required per mole of terephthalic acid is (a) 1 (b) 2 (c) 3 (d) 4. In which of the following polymers ethylene glycol is one of the monomer units? : 08UEB05561 Date : 13 APRIL 2012 . Search. It degrades before melting. In which of the following polymers ethylene glycol is one of the monomer. Answered By . Log in. The commercial name of polyacrylonitrile is _____ . DuPont introduced the first fiber under the trade name of Orlon in 1944 (Frushour et al., 2007). 17. i m B-tech in chemical Engg.working since 4 yrs in saudi arabia It melts above 300 °C if the heating rates are 50 degrees per minute or above. Polyacrylonitrile (PAN) is used as polymeric carbon precursor to form carbon fibers, electrospun activated carbon materials having meso-macro pores, carbon black additives. As a special class of cathode materials for lithium-sulfur batteries, pyrolyzed polyacrylonitrile/sulfur (pPAN/S) can completely solve the polysulfide dissolution problem and deliver reliable performance. Answer. 1. Upvote(0) How satisfied are you with the answer? The majority of commercial methods of production of polyacrylonitrile (PAN) are based on free radical polymerization of acrylonitrile (Fig. Conversion of Modified Commercial Polyacrylonitrile Fibers to Carbon Fibers . Though … Carbon fiber–reinforced polymers are used to create lightweight, high-strength structures such as airframes. Answer Plexiglass is a commercial name of polymethyl methacrylate or PMMA. It is used principally in clear, flexible, and impermeable plastic food wrap. Log into your account. Anionic polymerization also can be used for synthesizing PAN. 4. Living Edition | Editors: Enrico Drioli, Lidietta Giorno. However, poor mechanical performance has largely limited the application of electrospun PAN separators. [NCERT Exemplar] (a) Dacron (b) Orion (acrilan) (c) PVC (d) Bakelite. Video Explanation. Introduction At present, three precursors, including polyacrylonitrile-based, rayon-based, and pitch-based fibres, are mainly used for the production of carbon fibres. (i) Dacron (ii) Orlon (Acrilan) (iii) PVC (iv) Bakelite. zhuhe@cuhk.edu.cn Number of pages: 9 Number of tables: 2 Number of figures: 11 Number of videos: 2 7KLV (OHFWURQLF6XSSOHPHQWDU\0DWHULDO (6, IRU … (i) Dacron (ii) Orlon (acrilan) (iii) PVC (iv) Bakelite; Which of the following polymer is biodegradable? (i) Dacron (ii) Orlon (Acrilan) (iii) PVC (iv) Bakelite 1). More than 96% of commercial carbon fiber is derived from high-temperature heating (up to 1700°C) and stretching of a precursor fiber made from polyacrylonitrile (PAN) ([ 1 ][1]). Question 4. (ii) PVC (b) Polyacrylonitrile (iii) Acrilan (c) Polycaprolactum (iv) Natural rubber (d) Low density polythene (v) LDP (e) cis-polyisoprene 40. Home; Log in; Encyclopedia of Membranes. polyacrylonitrile with another sy nthetic polymer is seldom compatible due to the strong dipole-dipole ni trile group int eractions and the weak van dal Waal bond of its structure [71- 75]. 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