paper bag

Following on my research question in appendix D, I tested the same experiment with a paper bag. Yup, its the bag that the canteen stall vendor uses to put paus in.

So, as expected, the paper bag totally gave way to the pencil when it was pierced in. The hole made by the pencil just became bigger.

The start of my experiment

To start off my project, I decided to first test out whether the experiment conducted by Steve Spangler was really plausible or not. And the results were excellent, if I may say so. Below are the pictures I have captured:




Items needed: Ziplock bag, wooden pencil, water

Ziplock filled with water.

Sideview of ziplock bag full with water, without the pencil yet.

Pencil is poked entirely through the ziplock bag. No water is spilling out.

Close-up shot. The plastic is 'snug' around the pencil.

Under view. The pencil is really poked entirely though, with its mid-section in the water.

Water starts spilling out as soon as one end of the pencil is removed from the hole it has poked.

Polymer

macromolecule (large molecule) composed of repeating structural units

• subunits connected by covalent chemical bonds.

extraordinary range of properties of polymeric materials

• essential and ubiquitous role in everyday life
• familiar synthetic plastics and elastomers to natural biopolymers such as nucleic acids and proteins that are essential for life.

continuously linked backbone

• used for the preparation of plastics
• consists mainly of carbon atoms
• example: polyethylene, whose repeating unit is based on ethylene monomer.

A PLASTIC IS A POLYMER. BUT A POLYMER IS NOT A PLASTIC.


Source: wikipedia