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Spencer Silver's pressure-sensitive adhesive is useful because it has low tack, allowing it to stick lightly and be repositioned without leaving residue or damaging surfaces. It remains durable over time, works on various surfaces, and is non-permanent, making it ideal for temporary applications like Post-it Notes.

4o mini

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Spencer Silver, a chemist at 3M, invented a low-tack adhesive in 1968. This unique material could stick lightly and be removed without residue. It became the key component of Post-it Notes, launched in 1980, revolutionizing office supplies and earning Silver over 20 patents and numerous awards.

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Materials Chemists are scientist who Works on developing new materials through chemical processes. They use their scientific knowledge to create new materials or make changes in existing materials for better.

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Q: What New Material Did The Chemist

Spencer Silver Invent ?

Ans: Spencer Silver, a chemist at 3M, invented a "low-tack" adhesive in 1968, which became the key component of Post-it Notes. His invention allowed papers to stick together gently without causing damage.

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what new material did chemist invented ?

Play do

when and how did they invented ?

in 1930 . It started out as wallpaper cleaner

what properties of the material make it useful

Play do Encourages Creativity

Play do has a Sensory Calming Effect

Play do develops Fine Motor Skill

what uses does the material have?

learning experience for kids

group 6

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Spencer Silver invented the low-tack adhesive in 1968 at 3M. During his attempt to create a strong adhesive for aircraft construction, he accidentally developed a weak adhesive made of tiny acrylic spheres that stick lightly and can be removed easily without damaging surfaces.

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Q. What uses does the material that she has invented is useful?

Ans. The uses that wrinkle cotton has is being used in shirt's, pillows, sheets and uniform's. It is really comfortable to wear!

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Spencer Silver invented the adhesive for Post-it Notes in 1968 while working at 3M. He developed a low-tack, reusable adhesive that wasn't strong enough for industrial use but could stick lightly to surfaces. In the early 1970s, 3M colleague Art Fry used this adhesive to create a sticky bookmark, leading to the creation of the Post-it Note, which was introduced to the public in 1980.

4o mini

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Ruth Benerito, an American chemist, is renowned for her significant contributions to the field of fabric and textile science. She invented wrinkle-resistant cotton in the 1950s. This innovation was a major breakthrough that greatly improved the durability and convenience of cotton clothing. . Background and Research Setting:

Ruth Benerito was a scientist at the U.S. Department of Agriculture (USDA), where she worked in the Southern Regional Research Center in New Orleans, Louisiana.

She was focused on research that could enhance the properties of cotton, making it more practical for everyday use. This was during a time when cotton was facing increased competition from synthetic fabrics that were more resistant to wrinkles and easier to care for.

2. Scientific Approach:

Benerito's approach involved modifying the cellulose molecules in cotton fibers. Cotton is made up primarily of cellulose, which, in its natural state, is prone to shrinking and wrinkling.

Her research involved developing a way to chemically treat cotton to create stronger, more stable bonds within the cellulose structure, preventing the fibers from moving and thus reducing wrinkling.

3. The Chemical Process:

Benerito and her team experimented with different chemicals that could cross-link cellulose molecules. The goal was to find a treatment that would stabilize the cotton fibers without compromising their comfort or breath ability.

The breakthrough came when Benerito discovered that using a treatment involving formaldehyde-based resins would cross-link the cellulose fibers. This chemical process effectively "locked" the fibers into a shape that would resist wrinkles and shrinkage.

The treatment involved soaking cotton fabric in a solution containing the resin and then setting it with heat. This allowed the fibers to form chemical bonds that reduced their ability to move and wrinkle.

4. Testing and Results:

Benerito’s team conducted extensive tests to ensure that the new treatment did not weaken the cotton or affect its texture in a way that would make it less comfortable to wear.

The results were promising: the treated cotton maintained its shape and appearance after washing and wearing, significantly reducing the need for ironing.

5. Outcome and Patents:

Benerito's process was patented in 1955 under the title "Method of Treating Cotton to Make It Resistant to Wrinkling."

The invention was significant in making cotton a more attractive fabric for consumers who valued low-maintenance clothing. It led to the production of cotton garments that combined the comfort of natural fibers with the convenience of synthetic alternatives.

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Ans a: Ruth Benerito invented permanent press fabric and permanent press cotton Ans b: Ruth Benerito invented permanent press fabric in the 1950s . She developed a chemical process that treated cotton to make it wrinkle-resistant, reducing the need for ironing. Ans c: Permanent press fabric is useful because it is wrinkle-resistant and comfortable

ans d : Permanent press fabric is used in clothing, bedding, and home textiles like curtains and tablecloths, thanks to its wrinkle resistance and easy care.

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A)What new material did Stephanie Kwolek invent?

Answer)She invented a material called Kevlar which was a strong,heat resistant and synthetic fiber.

B)When did she invent it?

Answer)In a polymer research lab,she discovered super fiber known Kevlar.In 1965 she made first synthetic fiber.

C)What properties of Kevlar make it useful?

Answer)It has high strength,high modulus,toughness and thermal stability.

D)What use do Kevlar has?

Answer)It makes body of an aircraft,body armor,bulletproof vest,car breaks and boats.

Group 5

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The invention of wrinkle-resistant cotton fabric by Benerito, a physical chemist, is credited with saving the cotton industry. Synthetic fibers, such as nylon and polyester, were invented in the 1930s and 1940s.

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Materials chemists essentially adjust the properties of a material to create custom, or even brand new, materials with specific properties for specific uses. Most materials chemists are employed in industry by: Companies who make products from metals, ceramics, and rubber.

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It has been said that Ruth Benerito (1916–2013) saved the cotton industry with her discovery of a method for creating wrinkle-resistant cotton. By attaching organic chemicals to cotton fibers, Benerito and her team made cotton fabric not just wrinkle resistant but also stain and flame resistant.