Ethylene-butyl acrylate-maleic anhydride terpolymer

When evaluated by LOI, the system with zeolites has higher LOI than that without it. For example, compared with PP-APP-PER, which has an LOI of 30%, the LOI of PP-APP-PER system with zeolite 13X increases to 45%, an increase of 50%. Also the LOI of LRAM3.5 (ethylene-butyl acrylate-maleic anhydride terpolymer)-APP-PER system with 4A increases to 39%, relative to 29% for LRAM3.5-APP-PER system. All systems with zeolites obtained the UL-94V-0 grade. 

In previous work we have combined the intumescent APP-PER system with zeolites in an ethylene-butyl acrylate-maleic anhydride terpolymer (hereafter called LRAM3.5) and we have observed (in particular with 4A zeolite) a high degree of improvement in fire-proofing properties (Figure 6.4). 

Patlazhan et al. [11] studied the shear-induced fractal morphology of immiscible reactive polymer blends. The example of grafting and cross-linking multilayer systems of statistic terpolymer of ethylene, butyl acrylate, and maleic anhydride (MAH) and statistic copolymers (CPA) including... 

Figure 14.9 Effect of various impact modifiers (25wt%) on the notched Izod impact strength of recycled PET (as moulded and annealed at 150°C for 16 h) E-GMA, glycidyl-methacrylate-functionalized ethylene copolymer E-EA-GMA, ethylene-ethyl acrylate-glycidyl methacrylate (72/20/8) terpolymer E-EA, ethylene-ethyl acrylate EPR, ethylene propylene rubber MA-GPR, maleic anhydride grafted ethylene propylene rubber MBS, poly(methyl methacrylate)-g-poly(butadiene/styrene) BuA-C/S, poly(butyl acrylate-g-poly(methyl methacrylate) core/shell rubber. Data taken from Akkapeddi etal. [26]...

Examples of acid modified polyolefins are the copolymers of ethylene with acrylic acid or methacrylic acid. Variations include the partially neutralised acid copolymers with metal ions (ionomers) or terpolymers of ethylene, an acid and an acrylate such as methyl acrylate or isobutyl acrylate. Acid-containing extrudable adhesives are widely used to bond to aluminium foil. Examples of anhydride-modified polyolefins include terpolymers of ethylene, maleic anhydride and acrylates such as ethyl acrylate or butyl acrylate and the anhydride-grafted polyolefins. Some typical applications and stmctures of a variety of multilayer materials with extruded polymer tie-layer adhesives, as described in Du-Pont trade literature, are detailed in Table 16.2. 

In addition to the list, maleated polymers as coupling agents are produced by Arkema as Lotader series. They are not made by reactive extrusion. These compounds are terpolymers of ethylene, maleic anhydride and methyl, ethyl, or butyl acrylates. Acrylates make the compound rubbery and, therefore, reportedly decrease flexural modulus. 

In some cases, copolymerization is used. Typical of the products made in this way are terpolymers of ethylene, n-butyl acrylate, and maleic anhydride, such as the Lotader products from Arkema, which have proved to be very good coupling agents in filled EVA copolymers. 

---