Amino-Functionalized Polyethylene for Enhancing the Adhesion between Polyolefins and Polyurethanes

Abstract

Primary and secondary amino-functionalized polyethylenes were synthesized from commercially available maleic anhydride-modified polyethylene by reaction with mono-tert-butoxycarbonyl-protected diamines, N-(tert-butoxycarbonyl)-1,6-diaminohexane (tBocHMDA), and N-(tert-butoxycarbonyl)-N-ethyl-1,6-diaminohexane (tBocEtHMDA) followed by deprotection with trifluoroacetic acid. The structures of amino-functionalized polyethylenes were characterized by NMR and IR spectroscopies, and the data compared favorably to that of the corresponding model compounds. The amino-functionalized polymers showed significantly improved adhesive strength toward thermoplastic polyurethanes as compared to the parent maleic anhydride-modified polyethylene.

Reactive melt modification of polyethylene by ethyl acrylate/acrylic acid copolymers: rheology, morphology and thermal behavior

“…The blends of polyolefins and polyacrylates are of clear technological interest [11]. Due to low compatibility of polyolefins with other polar polymers, it is proven to use block or graft polymers as compatibilizer to enhance the interfacial adhesion and improve the properties [12][13][14]. The graft copolymers suggest advantages to enhance the interfacial adhesion by localizing at the interface and reducing interfacial tension in heterogeneous polymer blends [15].…”

Polyols from epoxidized soybean oil and alpha hydroxyl acids and their adhesion properties from UV polymerization

“…Higher-molecular-weight polyols are preferred to attain polymer performance for some applications [14][15][16]. Alpha hydroxy acid (AHA) compounds contain a carboxyl group (COOH) with a hydroxyl group (OH) on the adjacent carbon.…”

Adhesion between polyethylenes and different types of polypropylenes

“…1 The advent of catalysis chemistry, new applications and an expanded user base are projected to fuel the growth of these polyolefins. PE and iPP are low-cost materials providing good mechanical properties for moderate temperature applications.…”

“…An alternative approach takes advantage of co-extrusion to fabricate a one-dimensional model of the melt blend. Although there is a considerable body of literature 1,3 on the use of interfacial coupling reactions to form covalent bonding between different phases leading to increased adhesion, there has been very little study of the adhesion between polyolefins without any chemical reactions occurring at the interface. The mechanism of adhesion at semicrystalline polyolefin interfaces and relevant parameters that affect adhesion are reported here.…”

“…Keywords: adhesion; crystallization; extrusion; interface; polyethylene; polypropylene INTRODUCTION Polyethylene (PE) and isotactic polypropylene (iPP) are the first and second highest-volume thermoplastics based on worldwide consumption. 1 The advent of catalysis chemistry, new applications and an expanded user base are projected to fuel the growth of these polyolefins. PE and iPP are low-cost materials providing good mechanical properties for moderate temperature applications.…”