The influence of environmental conditions on the dimensional stability of components injected with PA6 and PA66

Clavería, Isabel; Elduque, Daniel; Santolaria, Jorge; Pina, Carmelo; Javierre, Carlos; Fernández, Jesús J.

doi:10.1016/j.polymertesting.2015.12.008

Cited by 19 publications

(13 citation statements)

References 13 publications

(16 reference statements)

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“…The saturated water absorption of polyamide is directly related to its dimensional stability and is critical to its processing and application . Absorbed water can act as plasticizer or solvent, which leads to dimension change and lower the glass transition temperature of polyamide .…”

Section: Resultsmentioning

confidence: 99%

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Dong

Chen

Mutua

et al. 2017

Polymer Engineering & Sci

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To modify the properties of poly(hexamethylene oxamide) (PA62), amine-terminated polyoxypropylene glycols (PGs) were introduced into the polyoxamide main chain as soft segments. A series of PA62/PG2 copolymers were synthesized successfully by a two-step method. Fourier transform infrared spectroscopy, solution proton nuclear magnetic resonance spectroscopy ( 1 H-NMR), differential scanning calorimetry, thermogravimetric analysis, and wide-angle X-ray diffraction were used to analyze the structures and to investigate the properties of these copolymers. The saturated water absorption was also evaluated by gravimetric analysis for PA62/PG2 copolymers. The results revealed the incorporation of PG2 effectively modified the properties of PA62 and the copolymers with PG2 content of 10-20 mol% possessed high melting point (2938C-3148C), good thermal stability and low saturated water absorption. POLYM. ENG. SCI., 00:000-000, 2017.T 5 : the decomposition temperature corresponding to 5% mass loss. b T 50 : the decomposition temperature corresponding to 50% mass loss. c T max : the decomposition temperature corresponding to the maximum mass loss rate.

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Section: Resultsmentioning

confidence: 99%

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Dong

Chen

Mutua

et al. 2017

Polymer Engineering & Sci

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“…Polyamide 6 (PA6) is a significant engineering resin that is widely used in electronics, automotive, high-speed railway, aircraft, household products and so on, because of its excellent toughness, good self-lubrication and thermal resistance [1,2]. However, PA6 is a flammable material with dripping during combustion, which poses potential fire risks.…”

Section: Introductionmentioning

confidence: 99%

Flame Inhibition and Charring Effect of Aromatic Polyimide and Aluminum Diethylphosphinate in Polyamide 6

et al. 2019

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An aromatic macromolecular polyimide (API) was synthesized and characterized, and used as a synergistic charring flame retardant in glass fiber reinforced polyamide 6 (GF/PA6). API and aluminum diethylphosphinate (ADP) exhibited better flame inhibition behavior and synergistic charring flame retardant behavior compared with ADP alone. The 5%API/7%ADP/GF/PA6 sample achieved the lower peak value of the heat release rate (pk-HRR) at 497 kW/m2 and produced higher residue yields of 36.1 wt.%, verifying that API and ADP have an outstanding synergistic effect on the barrier effect. The API/ADP system facilitated the formation of a carbonaceous, phosphorus and aluminum-containing compact char layer with increased barrier effect. FTIR spectra of the residue and real-time TGA-FTIR analysis on the evolved gases from PA6 composites revealed that API interacted with ADP/PA6 and locked in more P–O–C and P–O–Ar content, which is the main mechanism for improving flame inhibition and charring ability. In addition, the API/ADP system improved the mechanical properties and corrosion resistance of GF/PA6 composites compared to ADP alone.

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“…Water absorption test was a useful tool for estimating the dimensional stability of polymers under water conditions. The saturated water absorption of polyamide was directly related to its dimensional stability and was critical to its processing and application . Absorbed water can act as plasticizer or solvent, which led to dimension change.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of poly (1,6‐hexamethylene oxamide‐co‐m‐xylene oxamide) copolymers

Yang

Mutua

Gao

et al. 2018

Polymers for Advanced Techs

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To modify the properties of poly (hexamethylene oxamide) (PA62), m-xylylene diamine (MXD) was introduced into the polyamide main chain. A series of high molecular weight PA62/MXD2 were synthesized via a two-step method. The chemical structure of polymer was analyzed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy, and the results confirmed the formation of PA62/MXD2. DSC test showed that the T m of the copolymers were decreased as the molar contents of MXD in the range of 10 to 50 mol %. TGA analysis revealed that the thermal stability of the copolymers compared well with commercial PA6. Wide-angle X-ray diffraction studies suggested the copolymers with MXD content of 0 to 10 mol % possessed high crystallinity. The water uptake measurements were monitored, and the saturated water absorptions were found to be lower than 2.5 wt %. These properties gave them a competitive edge for application where precise dimensional stability and high thermal resistanceproperties are required.

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The influence of environmental conditions on the dimensional stability of components injected with PA6 and PA66

Cited by 19 publications

References 13 publications

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Preparation and properties of poly(hexamethylene oxamide) copolymers containing ether moiety

Flame Inhibition and Charring Effect of Aromatic Polyimide and Aluminum Diethylphosphinate in Polyamide 6

Synthesis and characterization of poly (1,6‐hexamethylene oxamide‐co‐m‐xylene oxamide) copolymers

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