MCQOPTIONS
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MCQOPTIONS
| 1. |
Polymers used for packaging films must have a surface energy _______ |
| A. | 5-25 mNm<sup>-1</sup> |
| B. | 29-45 mNm<sup>-1</sup> |
| C. | 45-55 mNm<sup>-1</sup> |
| D. | 10-25 mNm<sup>-1</sup> |
| Answer» C. 45-55 mNm<sup>-1</sup> | |