Polymers Presentation Notes

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Pages from VMU (presumably a university) are also shown, including eStudent and a portal.
A visit to polymers.com suggests the user's interest in polymer-related content.

The presentation is created by Group Eleven.
Team members include SHS (possibly indicating Senior High School) students from 2019, specifically OSTEM (likely a science, technology, engineering, and mathematics program).
Team members listed: Rocamora, Rivera, and Roales.

Introduction to Polymers.
Definition of Polymers: Polymers are extensive, chain-like molecules made up of recurring structural units referred to as monomers.
Types of Polymers.
Polymerization Process: The chemical process by which monomers (small molecules) are chemically bonded to form polymers (large, complex molecules).
Properties of Polymers.
Applications of Polymers.
Advantages and Disadvantages of Polymers.
Environmental Impact of Polymers.

Polymers are large molecules composed of repeating structural units called monomers, linked together through chemical bonds. These chains can be natural (like DNA and proteins) or synthetic (like plastics and nylon).
Polymers are ubiquitous which are found in everyday items like clothes, packaging, medical devices, electronics, and food.
The word polymer comes from the Greek words "poly" (many) and "meros" (parts), meaning “many parts.”

Polymers are extensive molecules composed of repeating structural elements known as monomers, which are chemically linked in lengthy chains. These chains can consist of thousands of atoms and may differ in length, structure, and composition. The arrangement of monomers and the types of bonds created give polymers a diverse array of physical, chemical, and mechanical characteristics.
Polymers can be natural (like cellulose, proteins, and DNA) or synthetic (including polyethylene, nylon, and PVC).
They are crucial resources in daily life due to their flexibility, sturdiness, and adjustability.

Polymers are classified into natural, semi-synthetic, and synthetic categories based on their origin and processing.

Definition: Naturally occurring polymers derived from plants, animals, or microorganisms.
Properties: Typically biodegradable and eco-friendly.
Examples:
- Cellulose: Found in plant cell walls, used in paper and textiles.
- Starch: A carbohydrate from plants, used in food and biodegradable plastics.
- Protein-based Polymers:
  - Silk: Produced by silkworms, used in textiles.
  - Wool: Protein polymer found in the fur of sheep.
- Chitin: Found in the exoskeletons of insects and crustaceans, used in medical and biotechnological applications.
- Rubber (Natural): Sourced from the sap of rubber trees, used in tires and other products.

Definition: Derived from natural polymers but undergo chemical modification to enhance their properties or make them more practical for various uses.
Properties: Retain some natural characteristics but are often more versatile, durable, or easier to process.
Examples:
- Cellulose Derivatives:
  - Cellophane: A thin, transparent film made by chemically treating cellulose, used in packaging.
  - Rayon: A fabric made from chemically modified cellulose, often used in clothing.
- Nitrocellulose: Used in films, coatings, and explosives.
- Vulcanized Rubber: Natural rubber treated with sulfur to improve its elasticity, heat resistance, and durability, commonly used in tires.

Definition: Polymers are entirely man-made through chemical processes that combine synthetic monomers into long chains.
Properties: Designed to have specific, engineered properties like strength, flexibility, or resistance to heat, chemicals, and wear.
Examples:
- Polyethylene (PE): Used in plastic bags, bottles, and containers.
- Polypropylene (PP): Found in packaging, textiles, and automotive parts.
- Polystyrene (PS): Used in packaging materials and disposable items.
- Nylon: Used in textiles, ropes, and industrial applications.
- Polyvinyl chloride (PVC): Used in pipes, flooring, and electrical insulation.
- Teflon (PTFE): Used in non-stick cookware and high-temperature applications.

Polymerization is the chemical process by which monomers (small molecules) are chemically bonded to form polymers (large, complex molecules).
Two main types of polymerization processes:
- Addition (chain-growth) polymerization: the polymer forms by repeatedly adding monomers to a growing polymer chain. This process typically involves a double bond or other reactive group in the monomer, which is broken to allow the monomer to link with others.
- Condensation (step-growth) polymerization: two or more different monomers react together, releasing a small molecule (like water, methanol, or hydrochloric acid) as a byproduct. This process occurs step by step, with small molecules joining to form larger chains.

Clothing: Used in synthetic fiber manufacture for textiles.
Money: Used for polymer films in currency (generally polypropylene).
Personal Protective Equipment: Used in disposable smocks, shoe covers, and coveralls (generally non-woven polypropylene fabrics).
Medical Applications: Used in drug delivery systems, bioinert synthetic polymers for stents, and single-use devices for blood collection/diagnostics.
Household Items: Widely used in typical developed-world homes.
Car Parts: Used extensively in the automotive sector.
Packaging and Containers: Used in rigid and film materials.
Electronics: Serve a range of purposes in electronics.

Most synthetic polymers, particularly plastics, do not break down and build up in landfills and oceans.
Microplastics have now been discovered in marine life, drinking water, and even in human blood.
To address these issues, researchers and companies are creating biodegradable polymers and bioplastics sourced from renewable materials such as corn starch or sugarcane.
Recycling initiatives are crucial for minimizing waste and encouraging a circular economy.
Public education and enhanced waste management systems are essential for reducing the environmental impact of polymer usage.

References to the Philippines, suggesting the presentation might be focused on polymers in the context of the Philippines.