Random Copolymer Polypropylene

Product specifications The process can produce a broad range of propylene-based polymers, including homopolymer polypropylene, random copolymers and terpolymers, heterophasic impact and specialty impact (up to 25% bonded ethylene) copolymers as well as high stiffness, high-clarity copolymers. 

There are three types of commercial polypropylene resins iso tactic polypropylene, random copolymer and impact copolymer. Both copolymer types use ethylene as comonomer, but otherwise differ significantly. 

Figure 12.34 Specific total work of firacture Wf versus ligament length / for deeply double-edge-notched tension (DENT) ( ) and single-edge-notched bend (SENS) ( ) 3 mm thick polypropylene random copolymer samples. (Reproduced with permission firom Fasce, Bernal, Frontini, et al., Polym. Eng. Sci., 41, 1 (2001))...

Borstar polypropylene random copolymers are characterized by excellent optical properties. The product portfolio also includes specialty grades for pressure pipe applications and copolymers with very low seal initiation temperatures. 

The potential and limits of DMA for the evaluation of the fracture resistance of isotactic polypropylenes, random copolymers of iso tactic polypropylene with ethylene, and isotactic... 

One of the most important usages of plastic pipes in construction is sanitary pipes. Polypropylene random copolymer is used in sanitary pipes due to its excellent chemical resistance and heat transfer properties. 

We used drinking water pipes, produced from polypropylene random copolymer (PPRC) as a raw material. Data were collected from 4 different pipelines in a predetermined time period. 

Two polypropylene random copolymers were used in this study An MFR 2 PP-R and an MFR 12 PP-R. They were used as ground powder. 

Two random copolymers of this type are of importance, ethylene-propylene copolymers and ethylene-but-l-ene copolymers. The use and properties of polypropylene containing a small quantity of ethylene in stereoblocks within the molecule has already been discussed. Although referred to commercially as ethylene-propylene copolymers these materials are essentially slightly modified polypropylene. The random ethylene-propylene polymers are rubbery and are discussed further in Section 11.9. 

Conformational disorder and kink-bands structures have recently been found also in random copolymers of syndiotactic polypropylene with small amounts of ethylene.192 193 The ethylene units are included in the crystalline regions193 and induce the crystallization of the metastable form II of sPP with conformationally disordered chains characterized by kink bands. Portions of chains containing the ethylene units tend, indeed, to assume a trans planar conformation, producing the kink-band defects in chains in the prevailing twofold helical conformation.192193... 

Polymers are very good glass formers, with a few notable exceptions. For some polymers, such as atactic polypropylene or random copolymers like... 

Polypropylene (PP) films were first produced by extrusion casting. Polymer is extruded through a slit or tubular die and quenched by cooling on chill rolls or in a water bath. Cast films can be sealed over a wide range of temperatures and do not shrink in a steam autoclave, Polymers with melt flow rates below 5 dg/min are usually used to maintain the stability of the extra date. Higher clarity films are produced using random copolymers. 

Well-defined diblock (P—R) and triblock (P R — P) copolymers consisting of the polypropylene block (P) and the ethylene-propylene random copolymer block (R) were prepared by adding ethylene monomer during the living coordination polymerization of propylene with the soluble V(acac)3/Al(C2H5)2Cl/anisole catalyst U1). 

The ethylene-propylene (EP), present as a component with 20 wt% in a copolymer or blend with isotactic polypropylene (iPP), are random copolymers with varying composition. 

Application To produce polypropylene (PP) homopolymer, random copolymer and impact copolymer using the BP Innovene gas-phase process with proprietary 4th generation supported catalyst. 

Products A wide range of polypropylene products (homopolymer, random copolymer and impact copolymer) can be produced to serve many applications, including injection molding, blow molding, thermoforming, film, extrusion, sheet and fiber. Impact copolymer produced using this process exhibits a superior balance of stiffness and impact resistance over a broad temperature range. 

Product The process can produce a broad range of polypropylene polymers, including homo-polymer, random copolymer and impact copolymer, which become high-quality grades that can cover various applications. 

Application To produce propylene-based polymers including homopolymer polypropylene, random and heterophasic impact and specialty impact copolymers using Spheripol process technology. 

Application The Borstar polypropylene (PP) process is a versatile technology. Through the choice of reactor combinations, homopolymers, random copolymers, heterophasic copolymers, and very high-rubber content heterophasic copolymers can be produced. 

Description Polypropylene with a melt flowrate ranging from 0.1 to 1,200 can be produced with the Borstar PP process. Currently, Ziegler Natta catalysts are used, but there is a potential to use single-site catalysts latter. When producing homopolymers and random copolymers, the process consists of a loop reactor and a gas-phase reactor in series. One or two gas-phase reactors are combined with this arrangement when heterophasic copolymers are produced. Propylene, catalyst, cocatalyst, donor, hydrogen, and comonomer... 

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