Polypropylene (PP) is a versatile thermoplastic polymer widely used across various industries due to its resilience to chemicals, heat, and fatigue. It's commonly found in packaging, textiles (such as ropes, thermal underwear, carpets), automotive components, laboratory equipment, and medical devices like syringes and specimen bottles. Its popularity stems from its excellent chemical resistance, low cost, and ease of molding. PP can be flexibly adjusted to meet specific needs, such as being made more rigid or more translucent, which makes it invaluable in both consumer goods and industrial applications. Additionally, its low density makes it attractive for products where weight reduction is essential, such as automotive parts, which contributes to fuel efficiency improvements.

It occurs naturally in igneous and metamorphic rocks. Titanium is the ninth most abundant element in the earth's crust. Minerals containing titanium such as ilmenite. rutile. slate titanium ore. and millstone are commonly found in nature. In nature. however. it does not exist as a pure metal. but as a compound. Sand beaches and hard rocks are usually mined for it.

Polypropylene is not produced via a condensation reaction; it is formed through a process known as polymerization, specifically chain growth polymerization. This involves the combination of propylene monomers (propene) in the presence of a catalyst, leading to long molecular chains. Unlike condensation polymerization, which typically involves the loss of small molecules like water or methanol as byproducts, chain growth polymerization for producing polypropylene does not involve the removal of small molecules. Therefore, polypropylene's synthesis is distinctly different from the mechanisms involved in condensation reactions, which are characteristic of other types of polymer formation processes such as the production of polyesters or nylons.