Facile Method of Preparing Supertough Polyamide 6 with Low Rubber Content

Ke, Zhuo; Shi, Dean; Yin, Jie; Li, Robert K.Y.; Mai, Yiu‐Wing

doi:10.1021/ma800495t

Cited by 58 publications

(54 citation statements)

References 39 publications

(54 reference statements)

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“…Blending is a well‐known method to modify properties of polymeric materials. Among the most common techniques, numerous articles describe the addition of an elastomeric phase as an effective approach to enhance toughness of polyamide‐based multiphase systems …”

Section: Introductionmentioning

confidence: 99%

Effects of mixing protocol on morphology and properties of PA6/ABS blends compatibilized with MMA‐MA

Castro

Oliveira

Kersch

et al. 2016

J of Applied Polymer Sci

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ABSTRACT:The effect of different mixing protocols in the preparation of PA6/ABS/MMA-MA (57.5/37.5/5 wt %) blends on their morphological, rheological, thermal, thermomechanical, and mechanical behavior were studied. Despite the second-phase size reduction due to copolymer incorporation, mixing sequence seems to play an important role in the properties of the blends. When PA6 is blended with the pre-blended ABS/MMA-MA system, compatibilizer is preferentially located in ABS phase and a co-continuous structure is formed. The co-continuity is believed to be responsible for the enhancements in toughness, but excessive presence of MMA-MA in ABS phase seems to hamper thermomechanical properties. On the other hand, when ABS is blended with the PA6/MMA-MA system previously prepared, compatibilizer is preferentially located in PA6 phase and a particle-in-matrix morphology is observed. The absence of excessive amount of MMA-MA in ABS phase avoids the negative effect on thermomechanical resistance, however enhancements in toughness are not so pronounced.

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Section: Introductionmentioning

confidence: 99%

Effects of mixing protocol on morphology and properties of PA6/ABS blends compatibilized with MMA‐MA

Castro

Oliveira

Kersch

et al. 2016

J of Applied Polymer Sci

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“…The critical interparticle distance at the brittle‐tough transition is plotted as a function of particle size. An equation is obtained by data‐fitting given by: Equation 12 is formally similar to model proposed by Corté and Leibler14 given by: Here L e is the thickness of elastic ligament; σ z and σ y are the tensile stress at brittle fracture and tensile yield stress, respectively; C is a coefficient related to the cavitation ability of the particles and the brittle fracture criterion 32…”

Section: Resultsmentioning

confidence: 99%

“…In comparison with Wu's theory, eq 11 is closer to realistic condition and has considered triaxial stresses around cavitated particles and change of dimension for yielded regions. Shi and coworkers32 had studied polyamide‐6 toughened by core‐shell rubber. Interparticle ligament thickness calculated from Wu's equation is less than critical particle distance base on Corté and Leibler's model.…”

Section: Resultsmentioning

confidence: 99%

Toughening of polycarbonate by core‐shell latex particles: Influence of particle size and spatial distribution on brittle‐ductile transition

Tang

Yang

et al. 2010

J Polym Sci B Polym Phys

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The impact toughness of polycarbonate modified with acrylic core‐shell latex particles was investigated. Addition of impact modifiers with size ranging from 115.7 to 231.4 nm can result in maximum impact strength. Equations for spatial distribution of modified particles were proposed to associate the interparticle distance with particle size and modifier volume fraction in terms of two possible morphologies, given by T = d[0.91/(φ)1/3 − 1] or T = d[0.88/(φ)1/3 − 1]. The influence of particle size on brittle‐ductile transition was also studied. The results indicated that critical interparticle distance was not a definitive value and had a narrow region. Moreover, there existed a linear relationship between critical interparticle distance and modifier size, that is, critical interparticle distance would enlarge with the increasing of core‐shell particle size. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 1970–1977, 2010

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“…It was reported that the core-shell particles with a rigid core and a so rubber shell were an effective toughener for semicrystalline polymers. 54 Upon orientation of the 2002D PLA chains, the assembly of the hard segment is gradually oriented in the stretching direction under the action of drawing and squeezing of the 2002D PLA chains. The oriented hard segment, separated from stretched irregular particles, acts as the stressconcentrator points at nano level and signicantly improves the elongation of PLAE20.…”

Section: 51-53mentioning

confidence: 99%

Enhanced mechanical properties of PLA/PLAE blends via well-dispersed and compatilized nanostructures in the matrix

Cai

Zeng

Zhang³

et al. 2016

RSC Adv.

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Polylactide (PLA) was toughened by a PLA-based thermoplastic elastomer (PLAE). PLAE was prepared by chain extension of PLA copolymer derived from polylactic acid (PLA) and poly(tetramethylene ether glycol) (PTMEG) via melt polycondensation. The tensile strength of the toughened-PLA (PLAE30) reached 70 MPa, while the elongation at break was found to be above 140% compared to its plain PLA counterpart. The relationship between the phase morphology of the blends and their mechanical behavior was investigated with atomic force microscopy (AFM), scanning electron microscopy (SEM), and scanning transmission X-ray microscopy (STXM). It was found that the well-dispersed nanoscale structures in the matrix of PLA/PLAE blends are mainly responsible for the significantly enhanced mechanical properties. Also discussed are the detailed microstructural development in PLAE and the toughening mechanism.

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Facile Method of Preparing Supertough Polyamide 6 with Low Rubber Content

Cited by 58 publications

References 39 publications

Effects of mixing protocol on morphology and properties of PA6/ABS blends compatibilized with MMA‐MA

Effects of mixing protocol on morphology and properties of PA6/ABS blends compatibilized with MMA‐MA

Toughening of polycarbonate by core‐shell latex particles: Influence of particle size and spatial distribution on brittle‐ductile transition

Enhanced mechanical properties of PLA/PLAE blends via well-dispersed and compatilized nanostructures in the matrix

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