Elastomers Engage

TABLE 8.1 Properties of Ethylene-Octene Elastomers Engage... 

The test were made aimed for determining a threshold value of content of elastomer in the iPP/EOE mixture, which was subject of the d5mamic vulcanization process, considering the influence of these parameters on variable properties of iPP. A series of tests was made, in which the proportions of PP and elastomer Engage I were changed in the range 15-60%, with continuous addition of the cross-linking system (silane A-172/ dicu-myl peroxide) 3/0.03% in relation to elastomer and antioxidant additive 0.2%. 

TABLE 8.3 Effect of Type of Elastomer Engage Modified With Silane A-174 on the Properties of the Dynamically Cross-Linked PP/EOE-55/45% Blends... 

J.J. Hemphill et al.. Expanding the product portfolio of ethylene elastomers - ENGAGE polyolefin elastomers for large volume TPO applications, in Proceedings of the SPE-Automotive TPO Global Conference, October 10-12, 2005, Sterling Heights, MI, USA... 

Influence of the content of elastomer Engage I on physical properties of TPE with PP and EOE modified (grafting/cross-linking) with a silane/ peroxide cross-linking system has been shown in Fig. 4.3 and Table 4.2. The content of comonomer had significant influence on such properties... 

Such behavior of elastomer Engage HI blended with PP resulted probably from its different rheological characteristic, including its four times lower viscosity and very high flow index as compared to Engage I, which... 

In this study, two kinds of base material were used a prevailingly linear neat PP (PP DM55pharm) and a thermoplastic polyolefin elastomer (Engage 8407), supplied by Borealis and Dow Chemical, respectively. Specific material data can be found on the manufacturers homepages [6, 7]. Engage 8407 is an ethylene-octene copolymer (EOC) with a monomer-ratio of 60% to 40% for ethylene and octene, respectively. It contains untreated talc particles of 1 /an (ave.) in size. Engage 8407, when blended with PP or polyethylene, can improve the overall impact performance and can also act as a melt flow enhancer to aid processing. 

New family of TPV having heat and oil resistance based on ACM and polyamide Development of crystalline-amorphous block copolymers (Engage), mettalocene catalyzed TPEs, Polyolefin elastomer (POEs), application research on TPEs Protein-based block-copolymer... 

In addition to the two-phase TPEs, two new technologies have emerged. They are the metallocene-catalyzed polyolefin plastomers (POPs, the name given to Exxon s EXACT product line) and polyolefin elastomers (POEs, DuPont Dow Elastomer s ENGAGE), and reactor-made thermoplastic polyolefin elastomers (R-TPOs). These new types of TPEs are often called metallocene elastomers-TPEs (MEs-TPEs) [87]. The new POPs and POEs are essentially very low-molecular-weight-Unear low-density PEs (VLMW-LLDPE). These new-generation TPEs exhibit mbber-like properties and can be processed on... 

Chattopadhyay S., Chaki T.K., and Bhowmick A.K., New thermoplastic elastomers from poly(ethyle-neoctene) (engage), poly(ethylene-vinyl acetate) and low-density polyethylene by electron beam technology structural characterization and mechanical properties. Rubber Chem. TechnoL, 74, 815, 2001. Roy Choudhury N. and Dutta N.K., Thermoplastic elastomeric natural rubber-polypropylene blends with reference to interaction between the components. Advances in Polymer Blends and Alloys Technology, Vol. 5 (K. Finlayson, ed.), Technomic Publishers, Pensylvania, 1994, 161. 

In solution, block copolymers display interesting colloidal and interfacial properties. They can be used as emulsifying agents in water-oil and oil-oil systems (6 ). In the later case, the oil phases are solid and they give rise to polymeric alloys (7.) or they are liquid and they allow the preparation of latexes in organic medium (8 ). However, the molecular structure of block copolymers based on polybutadiene PB (70 ) and polystyrene PS behave as thermoplastic elastomers when engaged in multiblock (PB-PS)n or triblock (PS-PB-PS) structures but never when implied in inverse triblock or diblock arrangements. Similarly the... 

Within the past five years, commercial interest in metallocene catalyst components for the polymerization of olefins has increased enormously. Commercial production of a rising number of polyolefin types from different companies is creating a burgeoning and highly diversified demand for metallocenes. New brand names (e. g., Metocene (Basell), Elite (Dow Chemical), Engage (DuPont), Exact (ExxonMobil), Luflexen (Basell), Apel (Mitsui Chemicals), Borecene (Borealis), Finathene (TotalFinaElf), Topas (Ticona), just to name a few) characterize polyolefins such as PE, elastomers, PP, cycloolefin copolymers (COCs) and PS from metallocene-type catalysts [1-3]. 

Establishments primarily engaged in manufacturing synthetic rubber by polymerization or copolymerization. An elastomer for the purpose of this classification is a rubber-like material capable of vulcanization, such as copolymers of butadiene and styrene, or butadiene and acrylonitrile, polybutadienes, chloroprene rubbers, and isobutylene-isoprene copolymers. Butadiene copolymers containing less than 50 percent butadiene are classified in Industry 2821. Natural chlorinated rubbers and cyclized rubbers are considered as semifinished products and are classified in Industry 3069. 

A milestone was reached in 1993 with development by Dow of the Insite technology, resulting in development of the polyolefin elastomers Affinity and, 3 years later, Engage . 

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