ADHESIVE EFFECT OF LINEAR LOW-DENSITY POLYETHYLENE GELS ON POLYETHYLENE MOLDINGS

Adhesive effect of linear low density polyethylene (LLDPE) gels in org anic solvents such as decalin, tetralin, and o-dichlorobenzene on high density polyethylene (HDPE) moldings has been investigated by shearin g tests, and DSC measurements. For all of the gels the temperature at which the heated gel starts to exhibit the adhesive effect was about 7 0 degrees C, which is similar to the result of LDPE gel. In particular , when heated at 110 degrees C, LLDPE gel in tetralin showed such a st rong bond strength that polyethylene plates of 3 mm in thickness and 2 0 mm in width gave rise to necking. It was found that LLDPE gel behave d as though it added LDPE gel to HDPE,gel namely LDPE-like components in LLDPE resin exerted the adhesive effect at lower heating temperatur e, HDPE-like components exerted the strong adhesive effect at higher h eating temperature. Copyright (C) 1996 published by Elsevier Science L td.