Reactive compatibilization and fracture behavior in nylon 6/VLDPE blends

Lazzeri, Andrea; Malanima, Marco; Pracellà, Mariano

doi:10.1002/(sici)1097-4628(19991227)74:14<3455::aid-app20>3.0.co;2-n

Cited by 17 publications

(2 citation statements)

References 15 publications

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“…The higher melting peak (220 8C) is due to PA6 crystals (a-form) which have reorganized during the heating run, whereas the lower peak (215 8C) corresponds to the melting of less stable crystals formed on cooling from the melt, most likely g-form crystals. [17,30] With increasing compatibilizer concentration, the two melting peaks of PA6 merged into a single peak at a lower melting temperature (about 216-217 8C). These changes can be related to the occurrence of grafting reactions at the interface between the polyamide and the compatibilizer, which consequently inhibit the rearrangement of PA6 chains during heating to form high melting crystals.…”

Section: Thermal Behaviormentioning

confidence: 99%

Reactive Compatibilization of PA6/LDPE Blends with Glycidyl Methacrylate Functionalized Polyolefins

Qian

Chionna²,

Pracellà³

2005

Macro Chemistry & Physics

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Summary: Blends of polyamide‐6 (PA6) and low density polyethylene (LDPE) were compatibilized by melt mixing with various polyolefins functionalized with glycidyl methacrylate (GMA), i.e., GMA grafted LDPE (LDPE‐g‐GMA), GMA grafted styrene‐ethylene/butylene‐styrene block copolymer (SEBS‐g‐GMA) and ethylene‐co‐glycidyl methacrylate copolymer (E‐GMA). Blends with PA6/LDPE composition ratios of 25/75 and 75/25 wt.‐%/wt.‐% were prepared in a Brabender internal mixer and their properties were evaluated by SEM, rheological measurements and DSC. Morphological investigation by SEM showed a neat improvement of phase dispersion and interfacial adhesion in all compatibilized blends when compared to PA6/LDPE binary blends. The variation of the dispersed phase size was analyzed as a function of blend composition, compatibilizer concentration and GMA content. The emulsification curves of compatibilized blends showed that the equilibrium size of dispersed particles at the saturation concentration of copolymer was lower when PA6 was the major component. The finest dispersion of the LDPE phase (<0.25 μm) was observed in the presence of SEBS‐g‐GMA copolymer. LDPE‐g‐GMA and E‐GMA displayed a similar compatibilizing efficiency. In all cases, the blends with a polyamide matrix presented a marked rise in torque and melt viscosity with increasing compatibilizer content. These effects were accounted for by a reaction between the epoxide groups of LDPE‐g‐GMA and the carboxyl/amine end‐groups of PA6, leading to the formation of an interchain graft copolymer. The phase transition processes of PA6 in the blends were influenced by the compatibilizer content and the interfacial interactions between the polymer components, suggesting a different role for the compatibilizer at the PA6/LDPE interface.SEM micrograph of PA6/LDPE 25/75 blend compatibilized with 2.5 phr SEBS‐g‐GMA.magnified imageSEM micrograph of PA6/LDPE 25/75 blend compatibilized with 2.5 phr SEBS‐g‐GMA.

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Section: Thermal Behaviormentioning

confidence: 99%

Reactive Compatibilization of PA6/LDPE Blends with Glycidyl Methacrylate Functionalized Polyolefins

Qian

Chionna²,

Pracellà³

2005

Macro Chemistry & Physics

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“…174,175 In situ preparation of PPC based on PA-6 and LDPE that was graft functionalised with MA or DEM led to interesting results. 176 The addition of PP ± MA compatibilisers improved the interfacial adhesion and the impact toughness of the compositions of PP and PA-6. 177,178 Probably, the interfacial adhesion becomes stronger due to the formation of hydrogen bonds between the end amino groups of PA and grafted MA; this leads to nearly complete homogeneity of polymer blends.…”

Section: Compatibility Of Polyolefin ± Polyamide Systemsmentioning

confidence: 98%

Molecular polymer–polymer compositions. Synthetic aspects

Pomogailo¹

2002

Russ. Chem. Rev.

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The main ways of improving the compatibility of The main ways of improving the compatibility of polymer ± polymer compositions containing polyolefins as one polymer ± polymer compositions containing polyolefins as one component are considered. Considerable attention is given to the component are considered. Considerable attention is given to the preparation of polyolefins in the presence of an ingredient bound preparation of polyolefins in the presence of an ingredient bound to the catalyst in the catalytic (including consecutive) polymer-to the catalyst in the catalytic (including consecutive) polymerisation of olefins. The so-called reactor blends and the synthesis isation of olefins. The so-called reactor blends and the synthesis and structure of diblock and conducting composites are described. and structure of diblock and conducting composites are described. The important role of compatibilisation of polymers of different The important role of compatibilisation of polymers of different nature with the use of a third component is pointed out. The nature with the use of a third component is pointed out. The formation mechanism of molecular compositions, the structure formation mechanism of molecular compositions, the structure and properties of the intermediate layer and the main fields of and properties of the intermediate layer and the main fields of application of synthetic polyolefin ± polymer compositions are application of synthetic polyolefin ± polymer compositions are discussed. The bibliography includes 335 references discussed. The bibliography includes 335 references. .

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Crystallization of Polymer Blends

Pracellà

2013

Handbook of Polymer Crystallization

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Reactive compatibilization and fracture behavior in nylon 6/VLDPE blends

Cited by 17 publications

References 15 publications

Reactive Compatibilization of PA6/LDPE Blends with Glycidyl Methacrylate Functionalized Polyolefins

Reactive Compatibilization of PA6/LDPE Blends with Glycidyl Methacrylate Functionalized Polyolefins

Molecular polymer–polymer compositions. Synthetic aspects

Crystallization of Polymer Blends

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