Oxazoline‐containing compatibilizers for polyamide/SAN and polyamide/ABS blends

Abstract

Polyamide (PA) and acrylonitrile/butadiene/styrene copolymer (ABS) may appear as a mixture in the recycled plastic stream. The incompatibility of these blends results in a blend with poor mechanical properties. The aim of this work is to partially convert the nitrile groups of the acrylonitrile/styrene copolymer (SAN) into oxazoline groups by reaction with aminoethanol (AE). Such modified SAN (SAN-m) can react with the amine or carboxylic acid end groups of PA, and therefore used as compatibilizers for blends of PA with ABS. SAN-m was found to reduce the SAN-domain size in the PA/SAN-blends. The initial acrylonitrile content of SAN-m had a strong influence on the degree of conversion into oxazoline groups and on the compatibilizing effect. Mechanical properties of SAN-m compatibilized PA/ABS blends were investigated.

Effects of olefin‐based compatibilizers on the morphology, thermal and mechanical properties of ABS/polyamide‐6 blends

“…18 In literature, an optimum amount of compatibilizer, which can provide fine and well-dispersed blend morphology, was studied and the researchers found out that after saturation concentration of compatibilizer is exceeded, the impact properties either decreased or remained constant. 6,7,22,44 In the current study, the compatibilizers used can act as tougheners because of their elastomeric nature with low glass transition temperature. For a given PA6 content, the impact strength of the blends compatibilized with EnBACO-MAH gives higher toughness than EMA-GMA due to the finer morphologies obtained in the case of EnBACO-MAH at 5 and 10% loadings.…”

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

“…Blends of polyamides with polyolefins and polyesters are particularly interesting and attractive from an industrial point of view. During the last years, it has been shown that such blends can be efficiently compatibilized with numerous compounds derived from maleic anhydride, acrylic acid, glycidyl methacrylate, oxazoline, etc., grafted onto the polyolefin chain so that hydrogen bonds, or even covalent bonds, can be formed between the two polymers at the blending stage [10][11][12][13][14][15][16][17][18]. Nanocomposites based on polyethylene (PE) and polyamide (PA) blends have also been studied.…”

Morphology and Thermal Properties of MCPA6/ABS by in situ Polymerization of ε‐Caprolactam

“…The blend components covered various polymers, among which styrenic copolymers, such as acrylonitrile-butadiene-styrene (ABS), acrylonitrilestyrene (SAN) and hydrogenated styrene-butadiene-styrene (SEBS) have been widely investigated. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] However, due to thermodynamical immiscibility, polyamide-containing blends usually exhibit poor phase dispersion and interfacial adhesion, which in turn result in unsatisfactory mechanical properties. Therefore, there is extensive interest in improving their compatibility by the use of a reactive compatibilizer, to enhance the interfacial adhesion and control the morphology of the polymer blends during melt blending.…”

“…Therefore, there is extensive interest in improving their compatibility by the use of a reactive compatibilizer, to enhance the interfacial adhesion and control the morphology of the polymer blends during melt blending. [6][7][8][9][10][11][12][13][14][15][16][17][18] An effective strategy for compatibilizing immiscible blends is using in situ formed block or graft copolymers at the interface, which act as emulsifiers to stabilize the morphology formed and enhance the interfacial adhesion strength between the phases. [1,6,[14][15][16][17][18][19][20][21][22] Summary: In this work, blends of monomer casting polyamide 6 (MCPA6) and acrylonitrile-butadiene-styrene (ABS) were successfully prepared by in situ polymerization via the application of e-caprolactam as a reactive solvent.…”