Interfacial Adhesion of Hot-Melt Films to Stainless Steel Improved by Grafted Hydrocarbon Resin
Communication optical cables in extreme environments such as submarine cables and tundra require the use of metal/plastic composite tapes that can resistant to extreme environmental applications.However,there are still industrial challenges with stainless steel/plastic composite tape interfaces that are difficult to bond.Herein,C5 and C9 petroleum resins grafted with maleic anhydride(C5-g-MAH,C9-g-MAH)were successfully prepared by melt grafting and introduced into ethylene-acrylic acid copolymer/linear low density polyethylene(EAA/LLDPE)blended system and hot laminated with stainless steel tape,and when the content of C5-g-MAH is 30 phr,the peel strength of stainless steel plastic composite tapes is the best,reaching 28.6 N/cm and 15.2 N/cm before and after immersion test,respectively.The contact angle test show that C5-g-MAH could effectively reduce the surface tension between the blends and stainless steel,and promote the metal surface adhesion.Differential scanning calorimetry and melt rheological behavior show that C5-g-MAH can be fully miscible with EAA/LLDPE,while lowering the melting temperature of the blend,activating the molecular chain segments,increasing the wettability of stainless steel and increasing the bonding sites,which greatly improve the interfacial adhesion between EAA/LLDPE film and stainless steel.
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