Toughened thermoplastics: 3. Blends of poly(butylene terephthalate) with (butadiene-co-acrylonitrile) rubbers

Miscibility and in vitro osteocompatibility of biodegradable blends of poly[(ethyl alanato) (p-phenyl phenoxy) phosphazene] and poly(lactic acid-glycolic acid)

“…Blend compatibility or miscibility is very important in applications that require uniform properties [31,32]. For example, two polymers with different degradation profiles can result in a uniform and predictable degradation profile only if they form miscible blends [20,21].…”

Fracture behavior of rubber‐modified injection molded poly(butylene terephthalate) with and without short glass fiber reinforcement

“…4 -6 These types of impact modifiers typically have a core of crosslinked butadiene or acrylic rubber and a shell of grafted chains that may physically intact with the ways that ensure good dispersion and coupling. The second category is blends with elastomeric materials, for example, acrylonitrile-butadiene-styrene (ABS), [7][8][9][10] butadiene-coacrylonitrile rubbers, 11 epoxidized ethylene propylene diene rubber (eEPDM), 12 and poly(ethylene-covinylacetate) (EVA). 13 Inclusion of rubber into the rigid thermoplastics to enhance the toughness of the subsequent system is, however, attained at the expense of strength and stiffness.…”

On Toughness and Stiffness of Poly(butylene terephthalate) with Epoxide‐Containing Elastomer by Reactive Extrusion

“…But high notch sensitivity and inadequate impact strength or energy of PBT, particularly at low temperatures, has restricted their wider usage. An effective method to modify and increase the impact strength or energy of PBTis to blend it with elastomers, e.g., maleated styrene-ethylene/ butylene-styrene block copolymer (SEBS-g-MA) or ethylene-propylene binary elastomer, [1] maleated poly(ethyleneoctene) copolymer (POE-g-MA), [2,3] butadiene-co-acrylonitrile elastomer, [4] epoxidized ethylene-propylene-diene monomer ternary elastomer, [5] oxazoline intermediates, [6] styrene-acrylonitrile/acrylate core-shell elastomer, [7] isocyanate-containing ethylene-propylene binary elastomer, [8] methyl methacrylate/ethyl acrylate/glycidyl methacrylate terpolymer (MMA-EA-GMA), [9,10] and ethene/methyl acrylate/glycidyl methacrylate terpolymer (E-MA-GMA). [11] Despite the immiscible and incompatible nature of PBT with these elastomers, the ability of the carboxyl and/or hydroxyl end groups of PBT to react with the elastomer reactivegroupsproved to be a major advantage in these blends forming elastomer-co-PBT copolymers in situ during melt extrusion.…”

“…[11] Despite the immiscible and incompatible nature of PBT with these elastomers, the ability of the carboxyl and/or hydroxyl end groups of PBT to react with the elastomer reactivegroupsproved to be a major advantage in these blends forming elastomer-co-PBT copolymers in situ during melt extrusion. [1][2][3][4][5][6][7][8][9][10][11] In addition to the above-mentioned advantages, these elastomers also serve as compatibilizers in PBT/polyolefin blends, which lower the interfacial tension between PBT matrix and elastomer and suppress the tendency of coalescence, ultimately improving the dispersion of elastomer Summary: To obtain a balance between toughness (as measured by notched impact strength) and elastic stiffness of poly(butylene terephthalate) (PBT), a small amount of tetrafunctional epoxy monomer was incorporated into PBT/ [ethylene/methyl acrylate/glycidyl methacrylate terpolymer (E-MA-GMA)] blends during the reactive extrusion process. The effectiveness of toughening by E-MA-GMA and the effect of the epoxy monomer were investigated.…”