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Science journal 4

Posted by on May 22, 2018

Design Journal Checklist # 4


Optimising Prototypes

  • You describe important observations about each of your prototypes and identify strengths and limitations of each prototype.
  • Recommendations for future improvements to your design.
  • You make a claim about which prototype was most effective for meeting your goal, and your claim is supported by evidence from your observations.
  • You present a clear method for how to make your final design.
  • You reflect on the design process and what you have learned.


  • Your writing is clear and concise with few grammar errors
  • You use scientific terminology
  • You create multimedia that suits the post and presented my information in a way that clearly explained my topic.
  • Group video is also linked to post
  • Your blog post demonstrated a sound ability to meet the publishing standards for a blog post, including a clear title with “Polymer Journal #”, a category of “Science,” and tags


Prototype Observations Strengths for this Prototype Limitations for this Prototype
16ml Borax, 8 ml of water, PVA solution: 5ml, Glue 1cm


Doesn’t stick very well, too rubbery, very smooth, too hard at first, doesn’t stretch



Bounces 15cm after hitting the table. Strength because of if it is bouncy, it means it’s stiff.


This polymer doesn’t stick to furniture so we can’t use it. It doesn’t stretch so when you first want to use it doesn’t fit to the furniture

1 cm of glue, 8ml of PVA, 3ml of borax, 4ml water



It was sticky but it didn’t sustain. After few second the polymer dropped down of flow. We decide to put more glue, 4ml more so it could become even stickier, 2ml of borax so the polymer is even flexible



There is no flexibility to change its shape consistently, but it hardens in a much more time.

However even we added more glues, the stickiness didn’t maintain as long as we wanted so we had to find another polymer which can maintain the stickiness.
15 ml of PVA, 4 ml of water, 5cm of glue, 2ml of borax




Sticky and doesn’t fall off, Stiff, Bouncy, Could Change into different shapes



Gives you enough amount of time to adjust the size, and could form into different shapes to fit at furniture.  If user accidentally hit a table corner, with this polymer they will be safe. Only problem is that after you opened the pack to use this polymer, in 4 minutes you have to stick polymer at furniture


Prototype Claim

Use evidence from above observations to complete.


Prototype # __2__, called World Best Polymer, was most effective for meeting our goal because: It was the perfect polymer what we were looking for. First, it was sticky enough to stick at furniture. Second, cushioning of polymer is enough to protect people from damage of crushing edge of furniture.











Method of Final Design

Give a summary of how your final product will be made.

Make sure you list the steps and amounts used.


15 ml of PVA, 4 ml of water, 5cm of glue, 2ml of borax


  1. Pour 5cm of glue and 4ml of water into the beaker.
  2. Add 15ml of PVA and 2ml of Borax.
  3. Add 2 drops of blue food colouring.
  4. Mix the ingredients with a wooden stick.
  5. Put it in your hands as you see the mixture of monomers making a polymer becoming a solid and add more 0.5cm of glue if there is no solid formed.
  6. Add one or two drops of glue if it is stringy and pour one or two drops of Borax if it sticks in your hand.

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