Lubricants melt strength improvers

It has been demonstrated that PAS in melt spinning operations can be better processed by the addition of barium hydroxide, together with conventional lubricants. In fact, the barium treatment has improved the melt strength of PAS in the production of fine denier fibers. This improvement in melt strength translates to the ability to melt-spin lower molecular weight polymer. ... 

Blending also addressed two aspects of PP processability high viscosity and poor melt strength. Several external lubricants were incorporated into the resin, viz. s 5 wt.% of either polydimethylsiloxane (PDMS), fluorinated polymers or elastomers. Usually, these blends also showed improved impact strength and elasticity. Another modification involved either copolymerization or grafting with acidic monomers, thus forming a transient crosslinking by the ion clusters. The presence of... 

In extrusion - blow moulding operations, molten polymer passes through a stage where it is processed with little external support. In these circumstances the moulding is likely to distort. The incorporation of a melt strength additive reduces the possibility of this occuring. Frequently, the materials used to improve melt strength are the same as those used for internal lubrication or plasticisation. 

Effect Antistat and lubricant properties, improving melt strength. Reduced additive volatility and degradation at high recycle rates... 

Molybdenum s melting point (2,623°C, or 4,753.4°F) exceeds that of steel by 1,000°C (1,832°F) and that of most rocks by 500°C (932°F). For this reason, the element is used in various alloys to improve strength, particularly at high temperatures. Approximately 75 percent of molybdenum produced is used by the iron and steel industries. The element is also utilized to make parts for furnaces, light bulbs, missiles, aircraft, and guns. Molybdenum disulfide is used as a high temperature lubricant, see also Coordination Compounds Inorganic Chemistry Scheele, Carl. 

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