GPPS General Purpose Polystyrenes

PS moulding material may eontain small quantities of lubricants (internally or externally) to help process the resin for end usage. The addition of antistatic agents, UV stabilisers, glass fibres, or colourants via compounding is also common. 

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Unit Ratio Material Balance for General Purpose Polystyrene (GPPS)... 

Abbreviations General purpose polystyrene, (GPPS) LDPE, HDPE, low- and high-density poly ethylene PP, polypropylene. 

Application To produce a wide range of general purpose polystyrene (GPPS) with excellent high clarity and suitable properties to process PS foam via direct injection extrusion by the continuous bulk polymerization process using Toyo Engineering Corp. (TEC)/Mitsui Chemicals Inc. technology. 

Application The INEOS polystyrene (PS) technology is based on a bulk continuous process giving access to a wide range of general purpose polystyrene (GPPS) also known as crystal polystyrene and high-impact polystyrene (HIPS), which incorporates rubber particles for high shock absorbance. 

Polystyrene is available commercially in several grades general purpose polystyrene (GPPS), medium impact (MIPS) and high impact (HIPS) polystyrenes and finally expandable polystyrene (EPS). Polystyrene is the third largest consumed thermoplastic in use today after PE and PP with 20% of the market. 

Atactic polystyrene is sometimes known as general-purpose polystyrene (GPPS). There are other commercial grades of polystyrene, such as medium-impact polystyrene (MIPS) and high-impact polystyrene (HIPS). These impact-resistant forms of polystyrene are specially formulated by grafting to a rubber, such as polybutadiene or a styrene-butadiene copolymer, and dispersed in the base polystyrene. The inclusion and detection of small amounts of butadiene-based materials into the base polystyrene has been discussed. 

In practice, three different types of polystyrene are distinguished. The transparent and brittle polymer is called general purpose polystyrene (GPPS), the white, non-shiny but relatively flexible, rubber modified polystyrene is called (high) impact polyst5Tene (IPS or HIPS). Expandable or foam polystyrene (EPS) is ihe third group to distinguish here due to its different production techniques. 

General purpose polystyrene (GPPS) process 4.2.2.1 Process description... 

There have been several examples of the unsatisfactory use of PS, because of the brittle nature of the material the application in toys is typical. Children frequently abuse their toys and thus a good impact performance is essential. General-purpose polystyrene (GPPS) breaks and exposes a sharp edge as an additional hazard. The advent of HIPS allowed the good features of PS to be retained, with the additional benefit of toughness at room temperature (the toughness falls dramatically below — 20°C), for only a small increase in... 

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