Thermoplastic Vulcanisates TPV

One of the most widely used TPV is sold under the trade name of Santoprene and this material has a low surface energy, thus making it difficult to bond with engineering adhesives. Whilst cyanoacrylates with a surface primer give good results (Table 4.15), the failure modes are invariably at the adhesive-Santoprene interface. 

On some grades of Santoprene (e.g., 103-50), adhesive shear strengths up to 8 N/mm can be achieved with an ethyl-based cyanoacrylate and primer but with other grades (e.g., Santoprene 201-55), only 1.5 N/mm is achieved. 

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Obviously, there exists severe interplastics competition, e.g. PP vs. ABS, clarified PP vs. PS, PA, PVC, HDPE and PS (Table 10.7). A wide range of cross-linked and thermoplastic elastomer applications, from footware to automotive parts and toothbrushes, are adopting new metallocene-catalysed polyolefin elastomers (POEs). These low-density copolymers of ethylene and octene were first accepted as impact modifiers for TPOs, but now displace EPDM, (foamed) EVA, flexible PVC, and olefinic thermoplastic vulcanisates (TPVs). Interpolymer competition may also result from... 

There has been an increasing global trend in the wire and cable industry to restrict and remove the presence of lead in materials used for insulation and jacketing applications. The various standards that apply to lead in electrical applications are discussed. One of the issues is how to define the low levels of lead. Many minerals contain trace levels of lead as a chemical impurity. These minerals are used in rubber and plastics and thus the final composition is likely to contain trace amounts of lead. With modem analytical techniques, lead can be found at levels lower than five parts per million. Therefore, to satisfy increasing demands on wire and cable materials, a new series of thermoplastic vulcanisates (TPV) has been introduced that contains no added lead chemicals. These TPV materials have recently been granted a UL listing for flexible cord applications. The properties of these materials are presented and highlighted. 6 refs. 

The majority of these systems are crosslinked, so are thermosets. The term thermoplastic vulcanisates (TPV) is also used (a.8). Copolymers are made from ethylene, propylene and a small fraction of unsaturated diene, so allowing the crosslinking of the foam. Eor applications such as mouse mats, the foam density is... 

Thermoplastic vulcanisates (TPV), blends of polypropylene with ethylene propylene diene (EPDM) copolymer, have replaced conventional rubbers in... 

Naskar, K., Gohs, U., Wagenknecht, U., Heinrich, G., PP-EPDM thermoplastic vulcanisates (TPVs) by electron induced reactive processing. Express Polymer Letters 2009,3(11), 677-683. 

The use of a gear pump feed of solid rubber compoimd is an ideal way for adding the rubber component to thermoplastic vulcanisates (the so-called TPV materials), once calibration of the gear pump for throughput has been completed. 

Another group in Malaysia [10] have looked into the viability of using reclaimed rubber from rejected NBR gloves in blends of PP for the production of thermoplastic vulcanisate(s) (TPV). The reclaimed NBR was evaluated as a partial replacement for virgin NBR in the blends in the range 40-70 phr. The TPV were prepared from the starting materials using a Banbury internal mixer, with... 

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