All About Polypropylen - 2

- The transverse strength is superior to 1016 O cm.

- By presenting good polarity, the loss factor is low.

- It has very good dielectric strength.

- Polypropylene has an apolar nature, and thus has great resistance to chemical agents.

- It has low water absorption; therefore, it does not have high dampness.

- It has high resistance to commercial detergents.

- Polypropylene as polyethylene has good chemical resistance but a weak resistance to UV (except when stabilized or protected).

- Boiling Point 320 ° F (160 ° C)

- Melting Point at greater than 160 ° C

 

Among the main applications and uses is polypropylene, are:

 

- manufacture of sacks

- bags

- Satin luster wrap, due to its good toughness.

- automotive parts, due to its reduced weight, low price, and ease of formation

- household utensils

- toys

- cassette tapes

- drawing or writing pads

- parts of devices

- packages

- laboratory equipment

- bottles of different types

- casing for electrical appliances

- packaging

- tape cases

- fibers

- monofilaments

- pipes

- boat hulls

- auto seats and parts, e.g., battery boxes and bumpers

Polypropylene is without a doubt one of the polymers that has the most potential in the future. This is evidenced primarily by its continued use even during times of economic downturn. New applications can be found within most sectors, with polypropylene emerging as a structural material considered one of the most advantageous for economic competitiveness. This means polypropylene is a member of the mass produced thermoplastic group that are utilized more than those that are engineered or that have high performance.

 

In 1954, the Italian G. Natta, following the work of K. Ziegler in Germany, achieved a polypropylene structure characterized by a regular isotactic structure. Its commercial use in household applications grew rapidly in Europe and North America by 1957.

 

The work of Natta and Ziegler allowed the development of ethylene polymers from olefins and opened the way for the production of other polymers. This plastic, with its semi-crystalline structure, is superior in mechanical properties to polyethylene. Its density was the lowest of all plastics and its price was also very low, but it had a great sensitivity to cold and ultraviolet light which made it age rapidly. For this reason its use was limited to only a few applications.

 

However, with the discovery of new light stabilizers and a greater resistance to cold obtained by the polymerization of the propylene−ethylene, polypropylene was reinforced with fiberglass, talc, asbestos, etc. and given its low price, became widely used.

 

Polypropylene's wide range of properties makes it suitable for a variety of applications in different sectors, providing a much cheaper alternative in the present and, increasingly, in the future. Therefore, the use of this material is growing, thanks in large part to the development of new and better products.