Polymer Journal Entry #3

With the final adjustments of the polymer, it is beginning to work well with our design goal. Getting to the point of the finished project was harder than expected, lots of surprises came along the way.

My first prototype was a absolute failure. The turnout was a green clear liquid that was like jelly. On the inside, there were clumps of corn starch and guar gum. On the outside, everything was very runny. Making this prototype, I first added 15 mL of liquid starch into a small cup. After that i added four drops of green food dye. Once mixed all the way through I added seven mL of PVA and then 3 grams of cornstarch. After I mixed it all together, I soon came to the conclusion that my liquid starch to PVA solution and cornstarch was completely off. I know that because when I added in the PVA, the jello wasn’t forming properly, and it ended up as much more liquid. I had also added them in the wrong order causing the clumps to form. The result was a super slimy, not very sticky, jelly substance. The results for the blob and hang test were what I was hoping for, they lasted a very long time and stayed molded. However with the bounce test, it bounced up approx. two inches off the table.

After tweaking the procedure, my second prototype was a success. This time I first added 5mL of liquid starch, then only three drops of food coloring all in a plastic cup. After that I added 10mL of PVA solution followed by 1.7 grams of cornstarch. Before I added the guar gum, the polymer was very sticky and stringy. It wasn’t the texture I was hoping for; however, after the guar gum was added, it became much more elastic. It still contained its stickiness, but it was less extreme and easily molded. With the tests, the polymer had no bounce at all, took 47 seconds in the hang test, and 1 minute and 21 seconds in the blob test. To test it out, I stuck it onto a metal water bottle, and it stayed molded without dripping for five minutes before we had to take it off

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image from here

Polymer Journal Entry #2

Type of Polymer Slime Rating Slow poke Fast poke Slow pull Fast pull Blob test (seconds) Hang test (seconds) Bounce test
Oobleck 3/5 Hard exterior, Gooey interior. Hard to poke through, crumbles. Stringy, stretches out, breaks off slowly. Breaks quickly and cleanly. 5 8 Plops onto plate.
Boogers 1/5 Damp, sticky, molds to finger. Molds to finger, doesn’t stick. Super stretchy, doesn’t break off for a long distance. Breaks instantly and cleanly. 56.65 11.88 Approx. 3cm bounce.
Super Slime 2/5 Molds around finger like a cushion. Breaks through, stays molded. Stretches out approx. 6 inches before breaking. Breaks in half instantly. 58.03 18 Approx. 2cm bounce.
Gloop 1/5 Really hard to break through, stays molded to tip of finger. Doesn’t budge. Breaks at around 2ft. Breaks instantly in half. Over a minute. Over two minutes. Approx. 10cm bounce.

 

Descriptions:

Oobleck – Slime like texture, however solidifies and crumbles with pressure; doughy, sticky.

Boogers – Super sticky, opaque. Looks shiny and smooth, smells like glue.

Super Slime – Slimy, bouncy, rubbery, diaphanous blue color. Sticky and smells like glue.

Gloop – Damp, feels like rubber or silly putty. Breaks easily, is opaque, smells like paint.

 

For our project, we are making a polymer that can protect phone screens from breaking. For that, I feel as if the Super Slime’s bounciness combined with Boogers stickiness and ability to stay molded will form a great base. I also think that Gloop’s capability to stay molded and not drip everywhere was a good characteristic to include in our polymer. To test the strength of our polymer, I was thinking about doing the blob test, hang test, and the bounce test. Doing these tests on our polymer will show if it is capable to withstand being on a phone and dropped. Then to test how well it can stick and stay molded to a phone, we will put it around a broken phone that is not in use and see the results over the course of 5 minutes. Then I will take the phone home, and overnight, see how well the case molded. To test if it is safe to drop, we will put it around a glass screen protector and drop it from different heights, recording all results.

Back to the Good Old Days

Pirate ships and adventures off to islands along the Mississippi River, nobody could take the venture out of Tom and his loyal friends. In the book, The Adventures of Tom Sawyer by Mark Twain, a story unfolds about the interesting life of Tom Sawyer. Tom lives with his foster Aunt Polly and a young boy named Sid. Packed with audacious adventures, Tom with his best friend Huckleberry Finn tackle adventures we only dream about. Living in a small town in America, many think it’s boring; however, Tom and Huckleberry don’t live by stereotypes. Through using certain phrases to describe their daily lives, we figure out the tone of the text.

Throughout the text, there was a very patent nostalgic tone. Growing up in the 21st century, lots of the ventures Tom Sawyer went on don’t occur in our daily lives today. But, because the sense of family and reckless fun was a common experience when we were younger. When reading the book, you feel like you’re reading an autobiography of an older man writing about his young self. Though Twain didn’t write this book based on his own childhood. It makes us remember the days when we thought we had met our soul mates at the ripe age of ten in Sunday school: “ ‘You only just tell a boy you won’t have ever have anybody but him, ever ever ever, and then you kiss and that’s all…’” (Twain 49). Remembering the first time we ever had a crush, confessing to them was the hardest part. Often the dialogue between two friends was very casual, the grammatical errors, the slang, the tone. Because of the contrast between the formal narrative text and the carefree dialogue made the whole thing very nostalgic. Another thing Mark Twain did to remind us of our childhood was using lines like “all the ‘rot’ [health magazines] contained about ventilation, and how to go to bed, and how to get up… was all gospel to her…” (75). We all experience a time in our childhood, when magazines become our best friends. Taking every quiz in the whole magazine until we find out if we’re a snicker doodle or a cinnamon bun, paying attention to those health magazines. We all felt at some point needing to listen, and really wanting to live healthier. Sometimes our parents would tell us everything in there was a lie, but kids never listen. He knows what buttons to push with trying to remind us of our childhood. This novel expresses many tones, but the main one would have is the nostalgic tone.

Another tone I found quite often was humor. Mark Twain wrote The Adventures of Tom Sawyer very satirically. Being only ten years of age, Tom Sawyer was young and immature. Filled with mischief, he envies Huckleberry Finn’s lazy lifestyle and freedom. As the novel progresses, we see Tom Sawyer mature, making better choices. How Twain narrates Sawyer growing up was bursting with humor. I found it all light-hearted especially when he uses phrases with words like “Auntie, I wish I hadn’t done it – but I didn’t think” (Twain 118). When I read this line, all I could think of was all the times I had ever said this exact phrase to my parents. He uses phrases like these sporadically throughout the book, making me chuckle at the immature excuses Tom makes to get out of trouble. Dripping with humor and nostalgia, Twain finds a good balance and writes a great childhood tale of two friends.

Overall, The Adventures of Tom Sawyer, showed a great deal of nostalgia and humor. Reading the book with bring you immense joy and longing at the same time. Laughing at the satire used in certain scenes to describe the daft behaviors of immature kids, longing the feeling of foolish fun. Certain phrases are so important to setting the tone of the whole adventure.

Polymer Journal #1

For the Sugru project, my group has to design a polymer to prevent objects from breaking. Since we are living in an electronic era, I thought a common object that most people have are cellphones. Now, teens tend to use mobile phones instead of landlines to communicate with each other; however, because some teens are clumsy, they are more likely to drop their phones causing them to crack. Our group decided we wanted to prevent poor phone screens from cracking through a protective case.

 

The basic structure of this case will be a small rubber that you put on the corners of your phone, overnight it will mold and stay in shape. We were hoping to create something cushy and soft, but durable. It wouldn’t be bouncy because that would cause the phone to jump all over the place. Another characteristic is that once you take it off the phone, you can mold it into another shape for all phone shapes and sizes. It won’t be like other cases because this one will provide much more support than a plain plastic case, plus it would mold to your fingers so it wouldn’t drop as much.

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Increase in Cell Phone Usage