Glass fibre reinforced polystyrene

M M Qayyum and J R White, Weathering of glass fibre reinforced polystyrene and poly(ethersulfone) , Polym Compos 1990 11(1) 24-31. 

Chen, C. H. and Wang, W. S. (1998), Development of glass fibre reinforced polystyrene for pultrusion. II Effect of processing parameters for optimizing the process . Polymer Composites, 19, 423 30. 

Some interesting differences are noted between amorphous and crystalline polymers when glass fibre reinforcement is incorporated into the polymer. In Figure 9.2 (ref. 10) it will be seen that incorporation of glass fibre has a minimal effect on the heat deflection temperature of amorphous polymers (polystyrene,... 

A typical layered structure consists of two thin, glass-fibre-reinforced polymer skins bonded to a thick, lightweight honeycomb core (Fig. 4.5a). Such sandwich panels are used in railway carriages and aircraft there are similar structures inside many skins. Other examples are less obvious the space between the outer container and the toughened polystyrene liner of a refrigerator is filled with rigid polyurethane foam. 

Is the mean length of the glass fibre reinforcement in injection-moulded polypropylene (fig. 4.28a) sufficient enough to give optimal stress transfer to the fibres Explain how the stiffness anisotropy in such a moulding arises. What new mechanisms of energy absorption arise when polystyrene is converted into a low density closed cell foam, and how can the compressive yield stress be controlled over a range of values ... 

Firebrake ZB and a brominated polystyrene, such as Pyrochek 68PBI or Saytex HP-7010, can provide a highly flame retardant PA66 formulation containing 25% of glass fibre reinforcement, without the presence of any antimony trioxide. 24% loading of the brominated FR plus 7% of the zinc borate produce V-0 at 0.8 mm in the UL94 test, with a CTI of 450 volts. 

In glass-fibre reinforced PA66 compounds a brominated FR present with a zinc borate and no antimony trioxide can produce a high FR performance and also an improved CTI. So, PA compositions with a CTI >400 volts and a UL94 V-0 classification at 0.8 mm can be developed using Firebrake ZB as a single active FR synergist with a brominated polystyrene. These materials show improved thermal melt stability. 

The first generation was introduced before 1950 and includes polystyrene, polyvinylchloride, low-density polyethylene, polyacrylates, polymethacrylates, glass-fibre reinforced polyesters, aliphatic polyamides, styrene-butadiene rubber and the first synthetic paints (alkyds). 

Table 3.8 presents a comparison of the performance properties for PPO/polyst5rene alloy and PPO/polystyrene alloy with 30% glass fibre-reinforcement. 

A study of polystyrene and poly ether sulfone, with and without 20% glass reinforcement [45], found that, after one year s exposure in Saudi Arabia, strength and ductility were retained better in the reinforced polymers, although the values in all cases fell to 50-77% of their original values. Other studies have shown that short glass fibres cause a significant increase in as-moulded residual stress in such polymers as well as in semi-crystalline polymers [46,47]. This can lead to stress cracking in service. 

Volnme resistivities have been reported on phenol-formaldehyde [37], carbon fibre reinforced ABS terpolymer [35], natural rubber [38], polystyrene (PS) [35], HDPE-natnral fibre composites [34], carbon black filled PP-epoxy-glass fibre composites [5], XLPE [32], nanoclay reinforced EPDM-g-TMEVS [31] and epoxy resin/PANI blends [33]. 

Tilebacker. Extruded polystyrene foam, reinforced with glass-fibre mat, and plastic modified mortar used as an underlay for tiles. 

To improve crack control and tensile strength various kinds of continuous fibre reinforcement are used for road and runway overlays with different fibres polystyrene, nylon, glass or steel. 

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