jueves, 19 de febrero de 2009

ACTIVITY 12

DEDICATED TO MARTINZILLO

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1. A _______________is a compound that is composed of macromolecules. They are very _________ molecules that have smaller repetitive ________ within the molecule, joined by __________ bonds. There are _________ and ___________ polymers.

2. The small subunits that make up a polymer are called ____________. A monomer is a type of compound that reacts with many molecules to form a ____________ molecule (macromolecule).

3. Polymers can be formed by a __________ monomer (unit) that ________ itself for a determined number of times, or by a sequence of different __________ that are repeated in an orderly way.

4. Write an example of chemical reaction and write the names of the reactants and also the name of the products

5. A ____________ is a substance that ________ up a reaction but does not participate in it (it is neither a reactant nor a product). It is usually written ________ the arrow.

6. A polymerization reaction is one in which the final product is a __________. There are 2 types of chemical reactions to form polymers:

7. Addition polymerization involves the union of molecules that have _______ or __________ bonds. These unsaturated _________ (identical monomers that make up polymers) have internal bonds that break and join others to form a chain of repeating monomers. Addition polymerization is used in the manufacture of polymers such as ______________, _____________, and _________________________ (PVC).

8. _________ is an alkene with the formula CH2 = CH2. Its common name is ____________. It is the monomer used in the addition polymerization to produce _________________

9. _________is an alkene with the formula CH2 = CH – CH3. Its common name is _____________. It is the monomer used in addition polymerization to produce ____________________.

10. _______________is an alkene with the formula CH2 = CH – Cl. Its common name is _______________. It is the monomer used in addition polymerization to make ____________________ (PVC).

11. Write the steps in the polymerization reaction:

12. ____________ is a very important industrial product since it has the following characteristics:

13. The ______________ is also affected by the number of monomers that it’s made up of. A chain of ________________ with 100 monomers joined together has the consistency of ___________. At 1000 monomers or more, it has a more ridge consistency.

14. __________________ is used to make refrigerator shelves, _________ milk bottles, _____________ coverings, toy, as well as other things.

15. ___________________is a thermoplastic polymer that is used in ____________________, ___________, ___________, reusable containers and thermal _________, as well as other items. The polymer __________ is used mainly in construction.

16. In ____________polymerization, 2 different monomers react to form a polymer, with water being liberated as a byproduct.

17. _____________ is a polymer that is formed when a _____________ acid reacts with a ______. A dicarboxylic acid has 2 ____________ groups. A diol is an _____________ that has 2 hydroxyl groups. These two monomers are joined by condensation polymerization. Textile fibers are made with __________.

18. The main reason that _________ was created was to find a synthetic fiber to match the properties of natural ________. Nylon is a __________ synthesized by ____________ polymerization.

19. Write some examples of natural polymers:

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