Because of the high speed development of the real estate industry, the domestic demand for high quality PP pipe material is large, the current domestic only 4220 of yanshan petrochemical, B8101 can meet the requirements of domestic specification pipe production enterprises, lack of part of the need to rely on imports, mainly imported products have a Nordic chemical RA130E, BASELL EP332C, Korean oil RP2400, Korean phosphor R200P and South Korea's LG R910, etc. The characteristics of imported polypropylene are as follows: high molar mass, MFR less than 0.5g/10min, high molar mass, large number of lacing molecules, strong ability to prevent crack growth; Secondly, the molar mass distribution is wide, preferably bimodal distribution, so as to facilitate processing and production; Finally, ethylene or other alpha-olefin copolymerization is used to provide a certain impact resistance.
As the world's largest market for polypropylene, China has attracted the attention of international petrochemical giants. From the above analysis, it is not difficult to see that European, American, Japanese and other enterprises with strong scientific research and technical strength, firmly occupy the high-end field of imported polypropylene products; South Korea, Singapore, Thailand, Malaysia and Taiwan are the main sources of polypropylene imports by virtue of their geographical and long-term domestic sales network. Countries in the Middle East, relying on their strong cost advantages, are likely to catch up. In addition, different from traditional foreign trade, Saudi Arabia's two joint ventures in tianjin and fujian have been put into production in recent years, and Kuwait's joint venture in zhanjiang has laid the foundation. The uae's raw material packaging plant in nansha, guangzhou, started production last year, accelerating the penetration of imported polypropylene into the domestic market. For domestic polypropylene enterprises, it is necessary to carry out industrial upgrading as soon as possible, develop differentiated products with special technical content and performance, understand differentiated demands of customers through services and find new demands, and establish long-term strategic cooperative relations with large downstream factories to cope with future challenges.
Fold and edit the physical data in this section
1. Properties: white powder
2. The density (g/mLat 25 ° C) : 0.9
3. Relative vapor density (g/mL, air =1) : not determined
4. Melting point: 189
5. Boiling point: not determined
6. Boiling point (C, 0.1mmhg) : not determined
7. Refractive index (n20/D) : not determined
8. Flash point: not sure
9. Specific rotation: not determined
10. Spontaneous combustion point or ignition temperature (C) : not determined
Vapor pressure (mmHg, C) : not determined
Saturated vapor pressure (kPa) : not determined
13. Heat of combustion (KJ/mol) : not determined
14.. Critical temperature: not determined
15. Critical pressure (MPa) : not determined
16. Logarithm of oil-water (octanol/water) distribution coefficient: not determined
17. Upper limit of explosion (%,V/V) : not determined
18. Lower limit of explosion (%,V/V) : not determined
19. Solubility: soluble in solvents such as dimethylformamide or thiocyanate
Fold and edit this section for classification
According to the position of branched chain atoms, polypropylene can be divided into atactic, isotactic and interisotactic configurations.
Isotactic polypropylene branched chain atoms are distributed on the same side of the main chain. As shown in figure a
Polypropylene classification picture 1
Interisotactic polypropylene branched chains are symmetrically spaced on both sides of the main chain. As shown in figure 2
Polypropylene classification figure 2
Fold this section to edit the adhesion of polypropylene
K-720 is suitable for PP plastic adhesion, suitable for large area plate adhesion, high transparency, suitable for PP adhesion PP,PP adhesion PC,PP adhesion ABS,PP adhesion PVC,PP adhesion acrylic,PP adhesion metal,PP adhesion board.
The adhesion property of k-7007 is basically the same as that of k-720. It is light yellow and more economical.
K-620 is a small area of polypropylene PP adhesive, which must be used together with k-650 treatment agent for instant positioning and high strength.
Collapse edit this section storage method
Keep in a closed, cool and dry place to ensure good ventilation
Main purpose of folding and editing this section
Mainly used in the production of various long and short polypropylene fiber, polypropylene woven bag, packaging bag, injection molding products and other products for the production of electrical appliances, telecommunications, lighting, lighting equipment and television flame retardant parts
The eastern standard testing center indicates that there is no environmental stress cracking problem in PP. PP is usually modified by adding glass fiber, metal additives or thermoplastic rubber. The flow rate of PP MFR ranges from 1 to 40. PP materials with low MFR have better impact resistance but lower tensile strength. For materials with the same MFR, the strength of copolymer type is higher than that of homopolymer type. Due to crystallization, PP shrinkage rate is quite high, generally 1.8~2.5%. And the direction uniformity of shrinkage rate is much better than that of pe-hd and other materials. Adding 30% glass additives reduced the shrinkage to 0.7%. PP materials of homopolymer type and copolymer type have excellent moisture absorption resistance, acid and alkali corrosion resistance and solubility resistance. However, it is not resistant to aromatic hydrocarbon (such as benzene) solvents, chlorinated hydrocarbon (carbon tetrachloride) solvents and so on
Fold and edit the system number of this section
CAS no. : 9003-07-0
MDL number: UD1842000
RTECS number: UD1842000
PubChem number: 24866797
Fold and edit this section to calculate chemical data
1. Reference value of hydrophobic parameter calculation (XlogP) : 3.3
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond receptors: 3
4. Number of rotatable bonds: 1
5. Number of tautomers:
6. Topological molecular polar surface area (TPSA) : 29.5
7. Number of heavy atoms: 18
8. Surface charge: 0
9. Complexity: 312
Isotope atomic number: 0
11. Determine the number of atomic stereotactic centers: 0
12. The number of stereotactic centers of uncertain atoms: 1
13. Determine the number of three-dimensional structure centers of chemical bonds: 0
14. The number of stereotactic centers of uncertain chemical bonds: 0
15. Number of covalent bond units: 1
Folding and editing the properties and stability of this section
Avoid strong oxidants, chlorine, potassium permanganate
High tensile polypropylene fiber strength, elongation, high initial modulus, excellent elasticity. Therefore, polypropylene fiber wear resistance is good. In addition, the wet strength of polypropylene is basically equal to the dry strength, so it is an ideal material for making fishing nets and cables.
Hygroscopicity and dyeing quality light heat preservation, almost no hygroscopicity, but the core adsorption ability is strong, hygroscopicity and sweat removal effect is obvious; Polypropylene fiber hygroscopicity is very small, almost no hygroscopicity, moisture regain under general atmospheric conditions is close to zero. But it has the core absorption, can pass through the capillary in the fabric water vapor, but itself does not have any absorption. The dyeing property of polypropylene fiber is poor, and the chromatogram is incomplete.