Polypropylene 9003-07-0

Details:

Product introduction:

Molecular Formula	C22H42O3
Molar Mass	354.56708
Density	0.9 g/mL at 25 °C (lit.)
Melting Point	157 °C
Boling Point	120-132 °C
Appearance	particles (Spherical)
Merck	13,7663
Storage Condition	-20°C
Refractive Index	n20/D 1.49(lit.)
MDL	MFCD00084447
Physical and Chemical Properties	non-toxic, tasteless, small degree, strength and stiffness, hardness and heat resistance are better than low-pressure polyethylene, can be used at about 100 degrees. It has good electrical properties and high-frequency insulation is not affected by humidity, but low temperature time-varying brittleness, not wear-resistant, easy to aging. Suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Common acid and alkali organic solvents have little effect on it, and can be used in food.

high molecular weight polymer	polypropylene is a high molecular weight polymer formed by the polymerization of propylene monomer. The production process of polypropylene can be divided into five categories according to the type of polymerization: solution method, slurry method, bulk method, gas phase method and bulk method-gas phase method combination process. Polypropylene was first produced by the Italian Monte catinl company in 1957. At present, it has become the fastest growing plastic variety, and its output is second only to polyethylene and polyvinyl chloride, ranking third. according to different structures, polypropylene can be divided into three categories: isotactic, syndiotactic and random. At present, the most widely used is isotactic polypropylene, which can account for more than 90%. Random polypropylene can be used as additives, adhesives, modified materials, etc., as a carrier of modified Masterbatch, with high viscosity, good liquidity, excellent coating effect, due to the yield, price, use conditions and other reasons, at present, the random polypropylene as a modified Masterbatch carrier used by the manufacturer has been very few. Syndiotactic polypropylene is a low crystalline polymer, polymerized by metallocene catalyst, which was first developed in 1988 and belongs to high elastic thermoplastic material. Syndiotactic polypropylene has the advantages of transparency, toughness and flexibility, but the rigidity and hardness are only half of those of isotactic polypropylene. Syndiotactic polypropylene can be vulcanized like ethylene-propylene rubber, and the mechanical properties of the obtained elastomer are higher than those of ordinary rubber. Because of the high price, the current application of syndiotactic polypropylene is not wide, but it is a new growth point of polypropylene resin, and a new synthetic resin for modified materials. This information was edited by The Chemical Book.
Properties of polypropylene	① mechanical properties of polypropylene compared with polyethylene, the mechanical properties such as stiffness and hardness are relatively high, and the gloss is good, but it is still low in plastic materials. Where high strength is desired, this can be achieved by selection of high crystalline polypropylene or filled, reinforced polypropylene. The impact strength of polypropylene is related to the relative molecular weight, crystallinity, crystal size and other factors, and has a great dependence on temperature. The impact strength of polypropylene is lower at low temperature. Polypropylene also has excellent Bending resistance, fatigue resistance, its products at room temperature can be bent 106 times without damage. Electrical properties polypropylene is a non-polar polymer with excellent electrical insulation properties. Its electrical properties are basically not affected by the environmental humidity and the change of electric field frequency. It is an excellent dielectric material and electrical insulating material, and can be used as a high frequency insulating material. The arc resistance of polypropylene is very good, between 130 ~ 180s, which is a high level in plastic materials. Affected by the brittleness of polypropylene at low temperature, the environmental conditions of its application in the field of insulation are far less than polyethylene and polyvinyl chloride, mainly used for the insulation of communication cables and electrical housing. The thermal properties of polypropylene has good heat resistance, can be used at more than 100 degrees Celsius, light load up to 120 degrees Celsius, no load conditions, the highest continuous use temperature of up to 120 degrees Celsius, short-term use temperature of 150 degrees Celsius. Polypropylene has good boiling water resistance and steam resistance, and is especially suitable for the preparation of medical high pressure Disinfection products. The thermal conductivity of polypropylene is about 0.15~0.24W/(m · K), which is less than that of polyethylene, and it is a good thermal insulation material. Chemical resistant polypropylene is a non-polar crystalline alkane polymer with good chemical resistance. It is insoluble in any solvent at room temperature, but swelling may occur in some solvents. Polypropylene can resist the corrosion of acids, bases, salts and most organic solvents (such as alcohols, phenols, aldehydes, ketones and most carboxylic acids) other than strong oxidants, concentrated sulfuric acid and concentrated nitric acid. At the same time, polypropylene also has a good resistance to environmental stress cracking, but aromatic hydrocarbons, chlorinated hydrocarbons will make its swelling, more significant at high temperature. Polypropylene is also soluble in tetra-naphthalene chloride, decalin and 1,2, 4-trichlorobenzene at high temperature. (5) environmental properties of polypropylene weather resistance is poor, the tertiary carbon atoms on the hydrogen is easy to be oxidized, very sensitive to UV, oxidation and UV degradation. Polypropylene without stabilizer, placed in the room for 4 months, the performance of the sharp deterioration, after 150 C, 0.5~3.0h high temperature aging or 12 days in the atmosphere exposure to the Sun brittle. Therefore, antioxidants and light stabilizers must be added to the polypropylene resin. In the presence of copper, the oxidative degradation rate of polypropylene will be accelerated by hundreds of times. At this time, it is necessary to add copper inhibitors, such as salicylethylenediamine, benzoyl hydrazine or benzotriazole. Figure 2 shows the main performance indicators of polypropylene.
industrial production methods	the industrial production methods of polypropylene are solvent method (also known as slurry method), bulk method and gas phase method. In China, the solvent method is the main method, which is the purity of more than 99% of propylene (sometimes according to the need to add other copolymers) in alkane solvents (such as gasoline, hexane, heptane, etc.), with titanium trichloride as catalyst, diethyl Aluminum monochloride as activator, hydrogen as molecular weight regulator, continuous polymerization at 50 ℃,1MPa. The resulting solvent-polypropylene slurry suspension is continuously fed to the flash device, and after separating the unreacted propylene and part of the solvent from the top, the esterification reaction was carried out with methanol at 80-85 °c to destroy the remaining catalyst. After neutralization, washing, separation, drying and extrusion granulation, the milky white translucent granular product is obtained. The conversion of propylene can reach 95% when liquid propylene is polymerized at 70 ℃ and 3MPa without other solvents. the gas phase law is that propylene is fed into the reactor in the gaseous state and polypropylene is produced under the catalysis of Ziegler-Natta catalyst. These two methods have been developed rapidly due to their short process flow and low energy consumption.
application field	polypropylene has excellent processability, and can use a variety of processing methods to produce different products for various purposes. The amount of polypropylene injection molding products is very large, and the general daily necessities are mainly ordinary polypropylene. In the automotive, household appliances, industrial parts and so on, the amount of polypropylene or modified polypropylene is more, such as automobile bumper, wheel cover with toughened polypropylene, and instrument panel, steering wheel, fan blade, reinforced polypropylene for handle etc. There are many extrusion products of polypropylene, among which the largest amount is fiber and silk, which is mainly due to the good mechanical properties, wear resistance, chemical resistance and low price of polypropylene. Polypropylene filaments and fiber products mainly include monofilaments, flat filaments and fibers. Monofilament has small density, good toughness and good wear resistance, and is suitable for the production of rope and fishing net. Flat tensile strength, suitable for the production of woven bags, can be used for packaging fertilizer, cement, grain and chemical raw materials, can also be used for the production of woven cloth, the production of propaganda and rain cloth. Fiber can be widely used in the production of carpet, carpet, clothing, artificial turf, filter cloth, non-woven fabric and curtain. Extruded articles of polypropylene may also be used to produce films. The biaxially stretched film can improve the strength and transparency of polypropylene, and can be used as a typemachine tape, a cigarette packaging film, a food bag, and the like. In addition, the polypropylene extruded article can also be used for pipe, sheet, narrow band, tear film, packing tape, etc. hollow products of polypropylene have good transparency, mechanical properties and moisture barrier properties, and can be used as packaging containers for detergents, cosmetics, pharmaceuticals, liquid fuels and chemical reagents. polypropylene is the main synthetic resin for the production of modified masterbatch. The earliest technicians of Beijing plastics industry company used atactic polypropylene (APP), a by-product of isotactic polypropylene produced by Yanshan Petrochemical Company, adding heavy calcium carbonate and related additives to produce filling modified Masterbatch, used in polypropylene products, such as flat wire, packaging tape, etc., can improve the product printing effect, reduce the shrinkage rate of products, improve economic efficiency. More importantly, it solved the way of by-product treatment in petrochemical plant, found the application field for Atactic polypropylene, and effectively improved the application value of the product. with the continuous improvement of the production process of synthetic resin, the isotacticity of polypropylene is improved, and the yield and quality of atactic polypropylene are also decreased, in particular, the application range and production of the modified Masterbatch are developing rapidly, and few manufacturers have adopted atactic polypropylene as a carrier of the masterbatch. At present, the carrier resin filled with modified Masterbatch is dominated by isotactic polypropylene, and the powdery polypropylene produced by small bulk method occupies an important position of the carrier resin.
Use	used in injection molding, extrusion molding, making a variety of products and a variety of fibers, narrow Band and film, etc. used in textile and weaving used in the production of air conditioning outdoor unit shell, beer box, long-term outdoor use of plastic parts such as highway shading Injection molding Blow-molding Film fiber (Textile/Yarn) flame retardant for polypropylene fiber and plastic electrical devices used in the manufacture of various parts for refrigerators, air conditioners, televisions, machinery and other industrial sectors can be used for water supply and drainage of cold, the manufacture of hot water pipe and pipe fittings has the characteristics of high strength, good creep resistance and excellent moisture and heat aging resistance used as coating and plastic processing aid used in the production of extrusion film, composite membrane plastic products used for cigarette filter tow oil used in the production of electrical appliances, telecommunications, lighting, lighting equipment and flame retardant parts of the television used for car bumper, instrument panel, decorative parts such as warm air casing, anti-friction strip, battery case and door inner panel used in electronics, electrical appliances, instruments, home appliances, light industry, chemical textile, automotive machinery and so on used in light industry sector production of reinforced polypropylene products used as raw materials for further processing of polypropylene pellets and products special oil agent for polypropylene production, smooth, cluster, anti-static and other effects, used for the production of polypropylene multifilament yarn, deformed yarn and heterogeneous yarn used for automotive interior and exterior accessories, engine fans, mechanical accessories, textile equipment, electronic and electrical parts, etc. can be used for cotton spinning, wool spinning, making artificial wool cloth, carpet, non-woven etc. used for making parachute, fishing net, filter cloth, rope, work clothes, clothing, cashmere blanket, artificial fur and so on mainly used for the production of various long and short polypropylene fibers used for the production of polypropylene woven bags, packaging bags, injection molded products and so on

 

Our company specializes in processing and selling chemical raw materials, chemical products, pharmaceutical intermediates, veterinary medicine intermediates, dye intermediates, pigments, cosmetics raw materials and chemical reagents,  

Our company has a number of sales team, service and information feedback vertical integration of a sound marketing network, products are sold throughout the country and exported to South Asia, Europe, America, Africa and other more than 20 countries and regions.  

Companies adhering to the "pursuit of quality, innovation and development" business philosophy, to serve as a foundation, for the survival by the quality, seek development by science and technology, adhere to quilty comes first,fair price,good sense of customer service and responsibility. in the future hebei Nengqian import and export trade Co.,Ltd will always hold "integrity, innovation" business philosophy, to achieve honesty management, on the way of specialization, internationalization,  Keep moving!  

 

 

 

 

 

Our advantages: 

1, High quality with competitive price:

1) Standard:BP/USP/EP/Enterprise standard

2) All Purity≥99%

3) We are manufacturer and can provide high quality products with factory price.

 2, Fast and safe delivery

1) Parcel can be sent out in 24 hours after payment.Tracking number available

2) Secure and discreet shipment.Various transportation methods for your choice.

3) Customs pass rate ≥99%

4) We have our own agent/remailer/distributor who can help us ship our products very fast and safe,

and we have stock in there for transferring.

Product Packaging：

1) 1kg/bag (1kg net weight, 1.1kg gross weight, packed in an aluminum foil bag)

2) 25kg/drum (25kg net weight, 28kg gross weight; Packed in a cardboard-drum with two plastic-bags inside; Drum Size: 510mm high, 360mm diameter)

 Storage：

Stored in a cool and dry well-closed container. Keep away from moisture and strong light/heat.

Delivery：

Usually within3-5 working days after full payment.

transport：

EMS,DHL, TNT, UPS ,FEDEX, BY AIR, BY SEA

DHL Express, FedEx and EMS for quantity less than 50KG, usually called as DDU service; 

Sea shipping for quantity over 500KG; And air shipping is available for 50KG above;

For high value products, please select air shipping and DHL express for safe;

Our Service:
1. Fast Delivery: We can delivery within 24 hours upon receipt of your payment.
2. Quality can be promised. Hot sell to Worldwide.
3. Payment Terms: T/T,, t/t
4. Free Sample available at any time.
5. Tracking your order at any time. Inform your order's further new situation at any time.
6. Package: Professional packing with professional materials.

FAQ: 
1.Are you a trade company or factory   
We are a  factory with our own trading company.  

2.How do you control the quality   
Our factory is equipped with professional technicians to control quality, out inspectors take sample for testing every 2 hours to ensure the quality of our production. We also accept BV, SGS or any other Third-party inspection.   

3.How long is lead time   
We deliver goods within 3 days for small order, 7-10 days for bulk order.   

4. Where is your factory located  How can I visit the factory   
 Our factory located in HEBEI, China.

5.Can i get some samples  
  Yes, we can supply free sample, but the shipping cost be paid by our customers. 

6.How to start orders or make payments  
  Proforma invoice will be sent first after confirmation of order, enclosed our bank information.Payment by T/T,  

7. How to confirm the Product Quality before placing orders  
  You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. 
8. How long is lead time

We deliver goods within 3 days for small order, 7-10 days for bulk order.

 

9. How do you treat quality complaint

  First of all, our quality control will reduce the quality problem to near zero. If there is a realquality problem caused by us, we will send you free goods for replacement or refund your loss.