Polymer post3.

The main physical property I want my polymer to have is color. This might sound like a really vague physical property, but I’ve noticed that more customers are more interested in your product, if you have a variety of colors and types. For the time being, our group has 2 main colors which are green and pink. I definitely think that color will make a really big difference. Now that we have completed our “mock” product pitch, I definitely noticed some areas where we have to greatly improve. Away we can develop our polymer is by trying different materials. If you look at our ingredients list, you can see that we used corn starch, but we also used glue. And the ratio between the glue and the cornstarch don’t balance out. So I definitely think that trying to use different materials that are more environmentally friendly/ biodegradable could really make a difference. A couple methods to test the effectiveness of the polymer could be leaving it out overnight, or even washing the polymer with water. Since we don’t know how the polymer would react with water, it would really be helpful to test it out by rinsing it with water.

Polymer post2.

Post2.

For our group, the second class was mainly based on making different prototypes for our cupholder. We experimented using different materials such as corn starch, PVA, and more. We also experimented using amounts of borax. My group and I found that the more borax, the more the polymer solidifies, but we also found that our polymer was more successful when we carefully measured out all the ingredients we used. Our main target/specific goal for this project is to create a polymer that can be used as a holder. For example, you pour a glass of milk and you leave the cup on the table, but accidentally you knock the glass of milk over. With our all new and original polymer, you will not have to worry about tipping over your drink again, because the polymer is easily removable, yet so easy to use. Our main target audience is everyone! From babies to grown adults. Here are images of the potential prototypes we could use. Each prototype has different ingredients used in it, and different consistency’s to it.

DT Robot


For our DT project, we were required to make an animal/robot for a 1st-grade petting zoo! My partner Hina, and I made a bear. There wasn’t much reason why we chose a bear, but we thought id look cute. Our bear has 2 main features, which are shown above in my thinglink. Something about our bear is that it is 3 dimensional, and has all the features inside, between 2 pieces of cardboard.

Something I’m really proud of is how we were 1/2 people who managed to complete our robot on time. I really appreciated how we put effort into completing this project.

Something I would like to work on if I had more time is the detailing. I would definitely color/draw more details on the bear to make it look really finished.

Overall, I would definitely say that I’m really proud of this project and that this was a success, and I’m really happy with how everything turned out. The bear moved accordingly to plan, and it looked decently nice.

Polymers

Polymers blog post#1

Science Blog Post on polymers!

By: Bessy Belay

Polymers are all around us, whether we like it or not! A polymer is a large chain molecule made up of repeated patterns of monomers。The Greek Prefix for “Poly” means many, and the suffix means “Parts”. In 1920, a German chemist that goes by the name Hermann Staudinger proposed the idea of polymers.

There are many different types of polymers, for example, “Biopolymer” or “Natural Polymer”, Synthetic polymer, thermoset plastics, or Thermoplastic polymers. There are major differences between the polymer’s listed above. For example, when we talk about natural polymer, some of the different types of polymers could be Silk, Wool, Amber, Keratin, DNA, Starch, etc.. But when it comes to synthetic polymers, some examples are Polystyrene, Synthetic rubber, silicone, etc… Synthetic Polymers are polymers that are prepared by a chemical reaction.

The process of creating synthetic polymers by combining many small monomer molecules into chains held together by covalent bonds is called polymerization! Polymerization can be split into 2 categories, Step-growth polymerization, and Chain-growth polymerization. The main difference between these two is that in a chain-growth polymerization process, monomer molecules are added to the chain one molecule at a time, whereas in step-growth polymerization, the monomers are bonded directly with one another.

If we take a closer look at the reactions happening while making the slime, The polyvinyl alcohol (PVA) can be made into slime by adding borax solution. This creates crosslinks between polymer chains. The more we add the borax solution onto the PVA, there will be more crosslinked molecules. The larger the polymeric material is made from the reaction. Causing the slime to become more solid.

 

Sources:

What is a polymer? www.thoughtco.com/what-is-a-polymer-820536.

Polymers. pslc.ws/macrog/synth.htm.

Image of polymer. saylordotorg.github.io/
text_general-chemistry-principles-patterns-and-applications-v1.0/
s16-08-polymeric-solids.html.

 

 

 

我的春天故事

春天

我觉得春天很美丽,因为阳光特别明亮,温度不热也不冷,有很多花会开。

在一个农民家附近有一个草地,那个农民看到草地以后,觉得已经春天了,但是草地上一朵花都没长。所以他跑到他家里去找花籽。拿到了以后,他赶快跑到草地上来种花籽. 那个 农民特别努力,他种完的时候已经到晚上十点半了。
第二天早上他去草地的时候,他什么都看不到,他问他自己“我昨天种的花籽怎么突然不见了呢?” 他突然听到声音,望上看的时候看到一大堆鸟在飞。难道是那些鸟吃了他种的花籽。那个 农民特别伤心的回家了,他昨天特别累,但是今天发现没用了。
几个星期以后,农民走出来以后看到一朵美美的红花,他跑到花旁边对自己说“哇啊好美丽呀!”

Once there was a farmer, there was this grassland by his compound, and when he looked at it, he imagined flowers growing on it, so that day he went home, and got seeds, starting to plant it. He was up all night planting and in the morning he realized the seeds were completely gone. Looking up he could see birds flying on top of him, he came to the conclusion that it was the birds that ate the seeds. A couple of weeks later, the farmer saw a red flower, he went up to it and said: “How magnificent”.

Enchanted Air

Enchanted Air

By: Margarita Engle.

 the historical context of the novel.

This girl has always stood in the middle of 2 places, as “Mami” is from Cuba and dad Is from America. Her grandparents on her father’s side live in Los Angeles, they don’t really know any Spanish, just English, Russian, and Yiddish. because they were born in Ukraine, somewhere they escaped from because of violence. Overall, the girl has an extremely diverse background making it hard for her to decide where exactly she belongs.

Kids who are multi-cultured often find themselves in a battle to figure out who they truly are within. This girl loves Cuba so dearly, but on the other hand, loves America as well. Although we, later on, read that she has a stronger liking towards Cuba, we still see that she struggles within about where she belongs. For example, when she says “one of my two selves is left behind”(p.25) We can tell that when returning to her “normal” life in California she emphasizes that part of her is still in Cuba. “Sometimes, I feel like a rolling wave of the sea, a wave that can only belong in between”(P.34) This was really powerful because not only does it show that the girl feels like she’s being torn into 2. A lot of us can relate to it. A lot of us can also relate to being born in one place, and growing up there, but having parents from somewhere else.