Rubber toughened polyamide 6: The influences of compatibilizer on morphology and impact properties

Abstract

In this study, styrene-(ethylene-co-butylenel-styrene (SEBS) triblock copolymer (Kraton G-1652) was modified with maleic anhydride (MA). The maleated SEBS was used as compatibilizer for the blends of Nylon 6 (PA6) and SEBS. The morphology and impact strength of the blends were measured as functions of concentration and MA graft ratio of maleated SEBS. The compatibility and fracture mechanism of the blends were evaluated from the SEM micrographs of the xylene-etched surfaces and of fractured surfaces. Some of the blends exhibited an impact strength up to about 30 fold greater than neat PA6. The fracture involved both both cavitation and shear yielding. The mechanism of compatibilization of maleated SEBS in the ternary components blends was proposed.

Improving the properties of reclaimed waste tire rubber by blending with poly(ethylene‐co‐vinyl acetate) and electron beam irradiation

“…Second degradation step is related to degradation of polyethylene chain (from EVA) and BR/SBR (from RTR). (Wu et al, 1993). Increased crystallinity of APS compatibilized blends are in line with improvement in tensile and tear strength of the blend.…”

“…The maleic anhydride (MA) group is often responsible in reactive interaction with specific component of polymer blend or composite (Ramesh et al, 2014, Rajan et al, 2014, Wu et al, 1993. The MA group has potential to reactively interact with hydroxyl groups forming a covalent bond.…”

Toughening and phase separation behavior of nylon 6-PEG block copolymers andin situ nylon 6-PEG blend viain situ anionic polymerization

“…Thus, impact modifiers or coupling agents containing functional groups such as anhydride or carboxylic acid are mostly used to enhance interfacial adhesion in nylon 6/modifiermelt blend systems. 10,11,17 In principle, these modifiers or coupling agents can react with nylon 6 during molding.…”

Preparation of a structured acrylic impact modifier and its application in toughening polyamide 6

“…There are extensive technical literatures on rubber‐toughened PA 6. Various types of rubber have been used, including styrene‐ethylene/butylene‐styrene block copolymer (SEBS) and/or SEBS grafted with maleic anhydride (SEBS‐ g ‐MA) [1–3] (EPR) and/or (EPR‐ g ‐MA) [4–13], styrene‐acrylic acid copolymer [3], acrylonitrile‐butadiene‐styrene copolymer (ABS) [14, 15], polyethylene‐octene copolymer (EOR) and/or EOR grafted with maleic anhydride (EOR‐MA) [16, 17], epoxidized ethylene propylene diene rubber [18], ethylene propylene diene rubber grafted with maleic anhydride (EPDM‐ g ‐MA) [19, 20], EPDM grafted with styrene acrylonitrile copolymer [21], core‐shell impact modifier [22, 23], polyvinyl acetate blended with ethylene‐acrylic acid copolymer [24], ethylene‐acrylic acid copolymer [25], polybutadiene [26], natural rubber with maleic anhydride (NR‐ g ‐MA) [27], carboxylated styrene‐butadiene rubber [28], acrylonitrile‐butadiene copolymer [29], carboxylated nitrile rubber [30], ultra‐fine fully‐vulcanized acrylate powdered rubber [31], and carboxylic styrene‐butadiene ultra‐fine full‐vulcanized powdered rubber [32]. Effective toughening agents must be functionalized or polar rubbers because PA 6 is a polar material.…”