Control of morphology and properties by the selective distribution of nano-silica particles with different surface characteristics in PA6/ABS blends

Liu, Xiqiang; Wang, Yu; Yang, Jie; Liu, Zhengying; Luo, Yong; Xie, Bin

doi:10.1007/s10853-012-6327-0

Cited by 37 publications

(18 citation statements)

References 46 publications

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“…The size distribution data show that the mean diameter of the ABS holes has dropped from

0.91 μ m

for TPU/ABS/1CNT to 0.48 μm for TPU/ABS/5CNT . This has occurred because MWCNTs were added to the TPU, which has a lower viscosity than the ABS ; and by adding MWCNTs to the matrix, the rheological properties of the TPU have changed . The covalent interaction between the nanotubes and the polymer matrix significantly improves the interfacial interaction; therefore, they considerably influence the mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

et al. 2017

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Some shape‐memory materials were prepared based on TPU/ABS blends containing pristine and organo‐modified multiwalled carbon nanotubes (MWCNTs). The shape memory and mechanical properties of the samples were investigated. Scanning electron microscopy (SEM) analysis performed on the morphological features of the developed samples showed the presence of pristine MWCNTs and decreased diameter of ABS droplets which were uniformly distributed within TPU matrix. Unexpectedly, the ABS droplets in nanocomposites with organo‐modified MWCNTs were greater than ABS droplets in TPU/ABS/CNT nanocomposites. These differences were attributed to different degrees in interfacial interactions between the modified MWCNT and TPU matrix. The presence of modified MWCNT in TPU matrix could have increased the differences in surface energy and polarity of TPU and ABS and it has disturbed the compatibility of the blend fundamentally. Also, the mechanical and Izod impact properties of the shape memory samples containing pristine MWCNT are better than those samples containing MWCNT‐OH and MWCNT‐COOH. The results showed optimum tensile strength in all samples containing 2 wt% MWCNTs. The shape memory results showed that the shape recovery and fixity of TPU/ABS blend improved significantly with increases in MWCNTs. The pristine MWCNTs improved the shape recovery ratio from 93.88% for the neat TPU/ABS blend to 99.3% for TPU/ABS nanocomposite by just loading MWCNTs at 2 wt%. Surprisingly, the shape fixity changed from 92.98% for the neat blend to 100% by loading of 2 wt% of MWCNT‐OH and 1 wt% of MWCNT‐COOH. The results showed that the functionalized MWCNTs had better performance in shape fixity as compared to its pristine MWCNT counterpart. POLYM. COMPOS., 39:E984–E995, 2018. © 2017 Society of Plastics Engineers

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“…The size distribution data show that the mean diameter of the ABS holes has dropped from

0.91 μ m

Section: Resultsmentioning

confidence: 99%

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

et al. 2017

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“…The pigments and filler are observed as clearer spots and can be identified with TiO 2 , Al 2 O 3 and AlPO 4 . The microscopic study of the non-exposed PA11 coatings shows no changes on the surface morphology or formation of irregularities due to nanoadditions, as the ones found in other systems [ 7 , 52 ]. Silica nanoparticles are not affecting negatively the final morphology of the PA11 coatings.…”

Section: Resultsmentioning

confidence: 69%

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

et al. 2020

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Polyamide coatings are thermoplastics with great advantages such as a good corrosion protection of the base metal and wear resistance. Their application as powder coatings is an environmentally friendly option that is currently attracting growing interest. However, during their life service, they can sometimes be exposed to conditions that they are unable to stand. In this work, a polyamide 11 (PA11) powder was reinforced with different percentages of silica nanoparticles (1–3 wt. %). Powder mixtures were prepared through extrusion followed by compression molding processes to manufacture coatings. For the coatings under study, the effect of 500 h xenon exposure was studied in order to know their ultraviolet (UV) resistance. Attenuated total reflection-Fourier transform infrared spectroscopy (FTIR-ATR) and differential scanning calorimetry (DSC) tests were performed to study changes in polymer structure and if they are affected by nanoparticles. The effect of nanoadditions and xenon exposure on hardness and stiffness were also evaluated. Furthermore, reciprocal wear tests were performed before and after irradiation, and the wear tracks were analyzed using optoelectronic microscopy and scanning electron microscopy (SEM). Finally, the aesthetic properties were measured. The results reveal improvements in mechanical and wear properties when 1% nanosilica is added to the PA11, which then become more relevant after xenon radiation exposure.

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“…In this stage, the shape recovery and chain relaxation are observed . In case of TPU/ABS blend, with incorporation of ABS the crystallinity of neat TPU increased , which shows the nucleating role of ABS in the blend . This increment in the degree of crystallization can enhance the shape fixity.…”

Section: Resultsmentioning

confidence: 95%

Thermo‐mechanical and shape memory behavior of TPU/ABS/MWCNTs nanocomposites compatibilized with ABS‐g‐MAH

et al. 2018

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Thermo‐mechanical and shape memory behavior of melt processed TPU/ABS (80/20 w/w) blends compatibilized with varying amounts of ABS‐g‐MAH loaded with multiwalled carbon nanotubes (MWCNTs) were discussed. The morphological observations by SEM and TEM techniques confirmed that introduction of ABS‐g‐MAH leads to a significant reduction in the size of ABS domain size due to improvement of interfacial adhesion between the blend components. Incorporation of MWCNTs to the compatibilized blend resulted in further reduction of the ABS droplet size. Mechanical properties investigations revealed that tensile strength of the TPU/ABS blend being about 26.4 MPa increases to 44.6 MPa, that is, about 70% improvement, on incorporation of 6 wt% ABS‐g‐MAH to the noncompatibilized blend. In the same direction, Young's modulus increases ca. 13%. A significant enhancement of about 70% in Young's modulus of the compatibilized blend was observed by inclusion of 2 wt% MWNCNTs. The shape memory results showed that interfacial compatibilization process has a strong positive impact on the shape recovery and shape fixity ratio of the blends. Moreover, loading MWCNTs into the compatibilized blend further improved these features. POLYM. COMPOS., 40:789–800, 2019. © 2018 Society of Plastics Engineers

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Control of morphology and properties by the selective distribution of nano-silica particles with different surface characteristics in PA6/ABS blends

Cited by 37 publications

References 46 publications

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

Manufacturing and Characterization of Coatings from Polyamide Powders Functionalized with Nanosilica

Thermo‐mechanical and shape memory behavior of TPU/ABS/MWCNTs nanocomposites compatibilized with ABS‐g‐MAH

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