Blends of Immiscible Polystyrene/Polyamide 6 via Successive In‐Situ Polymerizations

Pei, Aihua; Liu, Andong; Xie, Ting; Yang, Guisheng

doi:10.1002/macp.200600256

Cited by 13 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1(e,e')]. The same investigations had also been discussed in our previous researches 14–16. We speculate that the in situ anionic ring‐opening technique of LL plays a pivotal role in determining the morphology development of the PA12/PS blends.…”

Section: Resultssupporting

confidence: 79%

Investigation on particular morphology of immiscible polyamide 12/polystyrene blends

Yao²,

Xie³

et al. 2012

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

In this article, a particular phase morphology of immiscible polyamide 12/polystyrene (PA12/PS) blends prepared via in situ anionic ring-opening polymerization of Laurolactam (LL) in the presence of PS was investigated. SEM and FTIR were used to analyze the morphology of the blends. The results showed that PS is dispersed as small droplets in the continuous matrix of PA12 when PS content is less than 5 wt %. When the PS content is higher than 10 wt %, two particular phase morphologies appeared. First, dispersed PS-rich particles with the spherical inclusions of PA12 can be found when PS content is between 10 wt % and 15 wt %. Then, the phase inversion (the phase morphology of the PA12/PS blends changes from the PS dispersed/PA12 matrix to PA12 dispersed/PS matrix system) occurred when PS content is higher than 20 wt %, which is completely different from traditional polymer blends prepared by melt blending. The possible reason for the particular morphology development was illuminated through phase inversion mechanism. Furthermore, the stability of the phase morphologies of the PA12/PS blends was also investigated. SEM showed that the particular morphology is instability, and it will be changed upon annealing at 230 C for 30 min.

show abstract

Section: Resultssupporting

confidence: 79%

Investigation on particular morphology of immiscible polyamide 12/polystyrene blends

Yao²,

Xie³

et al. 2012

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…In case of PS content of 40 wt %, PA6 particles was thoroughly isolated by PS, i.e., the PS was matrix and PA6 was dispersed domain, which was confirmed by the SEM of formic etched binary PA6/PS blends in Figure 3(d). The detailed description of the morphology development of PA6/PS blends can also be found in our previous work 18…”

Section: Resultsmentioning

confidence: 99%

Effect of in situ synthesized macroactivator on morphology of PA6/PS blends via successive polymerization

Pei¹,

Liu²,

Xie³

et al. 2007

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

ABSTRACT:In situ polymerization and in situ compatibilization was adopted for preparation of ternary PA6/PSg-PA6/PS blends by means of successive polymerization of styrene, with TMI and e-caprolactam, via free radical copolymerization and anionic ring-opening polymerization, respectively. Copolymer poly(St-g-TMI), the chain of which bears isocyanate (À ÀNCO), acts as a macroactivator to initiate PA6 chain growth from the PS chain and graft copolymer of PS-g-PA6 and pure PA6 form, simultaneously. The effect of the macroactivator poly(St-g-TMI) on the phase morphology was investigated in detail, using scanning electron microscopy. In case of blends with higher content of PS-g-PA6 copolymer, copolymer nanoparticles coexisting with the PS formed the matrix, in which PA6 microspheres were dispersed evenly as minor phase. The content of the compositions (homopolystyrene, homopolyamide 6, and PS-g-PA6) of the blends were determined by selective solvent extraction technique. The mechanical properties of PA6/PS-g-PA6/PS blends were better than that of PA6/PS blends. Especially for the blends T10 with lower PS-g-PA6 copolymer content, both the flexural strength and flexural modulus showed significantly improving because of the improved interfacial adhesion between PS and PA6.

show abstract

“…First, they focused on the use of PS bearing specific functions: acrylic acid, manganese sulfonate or maleic anhydride . Then the focus was on direct in situ polymerization of the blend and more recently on the utilization of mineral nanofillers such as silica and montmorillonite . Halloysite nanotubes (HNTs) are a mineral of the kaolin group with the chemical composition Al 2 Si 2 O 5 (OH) 4 · n H 2 O.…”

Section: Introductionmentioning

confidence: 99%

Inner surface modification of halloysite nanotubes and its influence on morphology and thermal properties of polystyrene/polyamide‐11 blends

Sahnoune

Taguet

Otazaghine

et al. 2016

Polymer International

View full text Add to dashboard Cite

The asymmetry of halloysite surface chemistry was used to perform a selective modification of its inner surface via grafting of a synthesized styrene/(methacryloyloxy)methyl phosphonic acid copolymer. Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA) and pyrolysis gas chromatography/mass spectrometry were used to evidence and quantify the grafting. Then, raw and hybrid nanoparticles were incorporated in polystyrene (PS)/polyamide-11 (PA11) blends (80/20 and 60/40 wt%). Scanning electron micrographs showed differences in localization of the halloysite nanotubes (HNTs), since raw halloysite is concentrated in the PA11 phase while modified halloysite is also located at the PS/PA11 interface, leading to a better interfacial adhesion between PS and PA11. An inhibiting effect of modified halloysite on PA11 coalescence was evidenced by measuring the particle size distribution of the extracted nodules. Moreover, the presence of modified halloysite at the interface shows an improvement in terms of thermal stability as observed by TGA, but with no significant effects on PA11 crystallization behaviour as shown by differential scanning calorimetry results. Rheological measurements were carried out to study the influence of the surface modification of halloysite on the blend morphology. A gel-like behaviour was observed for the (60/40 wt%) HNTs reinforced composition that was enhanced in the case of 10% functionalized halloysite.

show abstract

Blends of Immiscible Polystyrene/Polyamide 6 via Successive In‐Situ Polymerizations

Cited by 13 publications

References 16 publications

Investigation on particular morphology of immiscible polyamide 12/polystyrene blends

Investigation on particular morphology of immiscible polyamide 12/polystyrene blends

Effect of in situ synthesized macroactivator on morphology of PA6/PS blends via successive polymerization

Inner surface modification of halloysite nanotubes and its influence on morphology and thermal properties of polystyrene/polyamide‐11 blends

Contact Info

Product

Resources

About