3720EXAM1KEYSP10 - SCHOOL OF POLYMER TEXTILE FIBER...

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SCHOOL OF POLYMER, TEXTILE & FIBER ENGINEERING PTFE 3720, EXAM 1 – KEY SP/10 Dr. Fred L. Cook February 25, 2010 HONOR STATEMENT By my signature below, I certify that I have neither given nor received aid in completing this exam: __________________________ _________________ Signature Date __________________________ Printed Name NOTE, READ FIRST !! –ALL 100 (QUICK-ANSWER!) QUESTIONS COUNT TWO (2 ) POINTS EACH, FOR A TOTAL OF 200 POSSIBLE POINTS ON THE EXAM. OBVIOUSLY, ALLOCATE YOUR TIME PER QUESTION WISELY. GOOD LUCK, AND DO YOUR BEST!!! FRED
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PTFE 3720 EXAM 1, SP/10 (COOK) - KEY 1. Shell Oil Company, which introduced the new Corterra® PPT fiber to the commercial market, is part of the PFFP Complex. T ___x_____ F __________ 2 . Medical Textiles cover fiber-based structures that are used in hospitals both inside and outside of the human body. T ___x_____ F __________ 3. The term “ tetra-mer ” is taken from the Latin and means: ____ a. One unit ____ b. No units __x__ c. Four units ____ d. Plastic ____ e. None of the Above 4. The largest cotton-producing state in the U. S. by far is ____Texas__________________. 5. Georgia’s rank among the nation’s cotton-growing states is ____second_______________. 6. The single most detrimental factor to U. S. cotton trash content was the introduction of the __automated cotton picking machines_______________________________ in the late 1960’s. 7. A classic “ A- B monomer, e.g., an amino acid, has a functionality of: ____ a. 0 ___ b. 3 ____ c. ½ __x_ d. None of the above In the next set of questions (8-13), match the major fiber polymer type(s) with the correct chemical functional group that is the polymer backbone linkage holding the polymer(s) together (use letters to designate your answers): a. Tencel® Lyocell Fiber b. Corterra® PPT Fiber c. Dupont Bicomponent Elastomer Fiber d. Viscose Rayon e. Spectra® Fiber f. Nylon 6,10 Plastic g. Wool h. Lycra® Elastomer i. Acrilan® Acrylic Fiber j. None of the Above
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8. –COO- (ester) _b, c_____ 9. –COC- (ether) _a, d_____ 10. –C-C- (alkyl) _e, i_____ 11. –CONH- (amide) _f, g____ 12. –OCONH- (urethane) _h_____ 13. -CSi(R)- (silicone) ___j___ 14. A small chemical molecule is released in __step growth (or condensation)__________________________polymerization processes. 15. High molecular weight chains are not produced in chain growth polymerization processes until very late in the reactor cycle. T ____________ F ____x________ 16. Within the solid state structure of a fiber, the transition between ordered and unordered phases is gradual and not clearly defined. T ____x____ F _____________ 17. The number of bonding sites is defined as the ____functionality______________________ of a single monomer. 18. Two of the three critical criteria that must be uniformly met to generate high molecular polymer in a step growth (condensation) melt polymerization reactor are: a. Stoichiometric balance of monomers b. High monomer purity (and the third one: high degree of conversion) 19. In 2009 the dominant (62%!) fiber contained in U. S. retail apparel store products was: ____ a. Nylon ____ b. Wool ____ c. Polyester ____ d. Polypropylene __x__ e. Cotton ____ f. None of the Above 20. “Acrylic fibers” by FTC ruling must contain 100% acrylonitrile (AN) repeat units in the polymer backbone. T ____________ F ____x_______
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21. The backbone polymers of both starch and cellulose are chemically exactly the same.
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