Issue 35/2015 - β crystal modification technology enhances PP value

Recently, Sinopec Beijing Research Institute of Chemical Industry successfully developed high-toughness homopolymer polypropylene technology
through β crystal modification.
The performance of two types of high-impact homopolymer polypropylene resins produced by this technology has been greatly improved
.
This move not only achieved a breakthrough in Sinopec's β crystal polypropylene zero, but also provided a new raw material choice
for domestic plastic processing and product production and application enterprises.

Among them, the impact resistance of the newly developed polypropylene for injection molding of small household appliance parts is more than twice that of the same melting finger homopolymer polypropylene, which has been applied in Midea electrical appliances and other enterprises; Another kind of extrusion processing is used as polypropylene for temperature and corrosion resistant pipes, and the product performance is at the international leading level among similar products, and the processing performance is better than foreign products
.

Homopolymer polypropylene has the characteristics of high rigidity, high heat resistance and corrosion resistance, but its impact strength is low, which will not only affect the yield of product processing, but also accidentally damage during the transportation and use of the product, limiting its application range
.
Although the impact strength of the material is greatly improved by toughening and modification methods such as impact copolymerization, it will also lead to problems such as the decrease in the heat distortion temperature of the material, the increase of dissolved substances, and the decrease in corrosion resistance, making its application limited
in electrical appliances, corrosion resistance and other related fields.

According to the researchers of the academy, compared with traditional polypropylene products, the use of high-toughness homopolymer polypropylene technology to produce high-toughness injection polypropylene can increase profits by about 2,000 yuan per ton, and the economic benefits are significant
.
At the same time, the product has a low damage rate and long life, which can further reduce the waste of
materials.
In addition, it is used to produce temperature-resistant and corrosion-resistant pipes, and replacing steel pipes with polypropylene pipes can also extend the service life of pipelines and reduce the risk of
"three wastes" leakage.
(Zhuo)