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The Influence of Compatibility between Petroleum Resin and Elastomer

author£ºadmin Date£º2016/12/29 17:33:28

The compatibility between petroleum resin and elastomer is an important factor affecting the adhesive strength of hot melt adhesive. Good adhesion of the tackifying resin and elastomer can reduce the amount of colloidal energy storage film. Under certain stress, the colloid and the adherend are fully bonded. If the two are incompatible, the amount of colloid energy storage film will be increased, which will reduce the adhesion between the adhesive and the adherend.

The compatibility between the tackifying resin and the polymer matrix is ​​a physical quantity related to both the polarity and the relative molecular mass of the resin. Polystyrene (PS) is compatible with natural rubber, but with aromatic styrene-butadiene rubber compatibility; the average relative molecular mass of 650, the relative molecular mass Polyvinylcyclohexane (PVCH) is very compatible with natural rubber, but the relative molecular mass of l800 PVCH and natural rubber is not compatible between. In the preparation of hot-melt adhesives when the oil resin and elastomer incompatibility between the compatibility or poor, the increase in the system of petroleum resin can easily cause the initial pressure-sensitive adhesive strength, holding strength and 180¡ã peeling strength of the three while reducing. Petroleum resin can not play a role in tackifying.