QUIZ 11a. Using Polymers and Plastics

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(a) Alkenes can be used to make such as poly(ethene) and poly(propene).

(b) In these reactions, many molecules () join together to form very molecules ().

(c) Polymers have different that depend on what they are made from and the conditions under which they are made and so can be to suit a particular purpose.

(d) For example, slime with different (different stickiness)can be made from poly(ethenol).

(e) Polymers have many useful and new uses are being developed.

(f) For example: new materials for consumer goods, coatings for fabrics, polymers for teeth treatment, for wound dressings and materials, including polymers which return to their original state after deformation, by responding to an external stimulus ('trigger') e.g. a change.

(g) Many polymers are not , so they are not broken down by and this can lead to problems with and of the environment.