Reactive extrusion of polypropylene/polystyrene blends with supercritical carbon dioxide

Hwang, Tae Yong; Lee, Sang-Mook; Yoo, Youngjae; Jang, Kwang-Ho; Lee, Jae Woo

doi:10.1007/s13233-012-0095-1

Cited by 15 publications

(11 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…30 Besides, synthetic resins such as UF are brittle, hindering sufficient transfer of tensions and, hence, causing reduced tensile strength such as in a bonding strength test. 31 Addition of modified starch leads to higher flexibility of the bond line with reduced brittleness and increased elongation at beak point. Under this circumstance, the bonding strength increases due to differences in intimate physical interlocking and also extent of phase separation in the bond line resulting to non-linear behavior causing increment of elongation and flexibility.…”

Section: Evaluation Of the Bonding Strength Based On Rsm Anfis And Annmentioning

confidence: 99%

“…Under this circumstance, the bonding strength increases due to differences in intimate physical interlocking and also extent of phase separation in the bond line resulting to non-linear behavior causing increment of elongation and flexibility. 27,31 Supplementary Figure. It is worth mentioning that the neural network model is initially fitted on testing and training data set (Supplementary Figures 9(a) and (b)) consisting of pairs of an input and the corresponding output which is defined as target.…”

Section: Evaluation Of the Bonding Strength Based On Rsm Anfis And Annmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of different modeling methods toward predictive capability evaluation of the bonding strength of wood laminated products

Nazerian

Razavi

Partovinia

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

The main aim of this study is usability evaluation of different approaches, including response surface methodoloy, adaptive neuro-fuzzy inference system, and artificial neural network models to predict and evaluate the bonding strength of glued laminated timber (glulam) manufactured using walnut wood layers and a natural adhesive (oxidized starch adhesive), with respect to this fact that using the modified starch can decrease the formaldehyde emission. In this survey, four variables taken as the input data include the molar ratio of formaldehyde to urea (1.12–1.52), nanocellulose content (0%–4%, based on the dry weight of the adhesive), the mass ratio of the oxidized starch adhesive to the urea formaldehyde resin (30:70–70:30), and the press time (4–8 min). In order to find the best predictive performance of each selected evaluation approach, different membership functions were used. The optimal results were obtained when the molar ratio, nanocellulose content, mass ratio of the oxidised starch, and press time were set at 1.22, 3%, 70:30, and 7 min, respectively. Based on the performance criteria including root mean square error (RMSE) and mean absolute percentage error (MAPE) obtained from the modeling of response surface methodology, adaptive neuro-fuzzy inference network, and artificial neural network, it became evident that response surface methodology could offer a better prediction of the response with the lowest level of errors. Beside, artificial neural network and adaptive neuro-fuzzy inference system support the response surface methodology approach to evaluate bonding strength response with high precision as well as to determine the optimal point in fabrication of laminated products.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Evaluation Of the Bonding Strength Based On Rsm Anfis And Annmentioning

confidence: 99%

Section: Evaluation Of the Bonding Strength Based On Rsm Anfis And Annmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of different modeling methods toward predictive capability evaluation of the bonding strength of wood laminated products

Nazerian

Razavi

Partovinia

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

show abstract

“…This indicates the formation of strong networks in the polymer matrix leading to enhanced resistance against external forces at low frequencies due to a deviating relaxation process among dispersed particles. This is correlated with the presence of block copolymers and enhanced interfacial interaction [ 15 , 33 , 41 , 42 , 43 ]. Further, it can be seen that the elastic stress responses of SIS are more pronounced in the low frequency range for lower PS concentration compared to LUC while this behavior is kind of switched concerning PP–PS 75:25 blends.…”

Section: Results and Discussionmentioning

confidence: 99%

Effect of Different Compatibilization Systems on the Rheological, Mechanical and Morphological Properties of Polypropylene/Polystyrene Blends

Seier¹,

Stanic²,

Koch³

et al. 2020

Polymers

View full text Add to dashboard Cite

The influence of reactive processing, non reactive and reactive copolymers on immiscible polypropylene (PP)–polystyrene (PS) blends with varying PS concentrations (10 wt.% and 25 wt.%) was evaluated by mechanical (tensile and tensile impact), rheological (melt flow rate, extensional and dynamic rheology) and morphological (scanning electron microscopy) analysis. As an extended framework of the study, the creation of a link to industrial applicable processing conditions as well as an economically efficient use of compatibilzing agent were considered. For radical processed blends, a high improvement in melt strength was observed while non reactive copolymers exhibited a pronounced increase in toughness and ductility correlated with overall best phase homogeneity. Conversely, the influence of the reactive copolymer was quite different for the varied PS concentrations not allowing the assumption of a specific trend for resulting blend properties, but nevertheless in the case of a lower PS concentration the tensile impact strength exceeded the value of virgin PP. Since PS and PP are widely used, the findings of this work could not only be relevant for the generation of more versatile blends compared to virgin components but also for recycling purposes, allowing the enhancement of specific properties facilitating the production of more valuable secondary materials.

show abstract

“…Also, the effect of interchain repulsions due to increasing time interval allows hydrophobes to take part at least to some extent in intramolecular associations. This increasing hydrophobic behavior is expected as the time interval increases [19][20][21][22][23][24][25]. In the development of amino resins for emulsion paint formulation, resin solubility or dispersability in water is an important factor in the resin's acceptability [25][26][27][28][29][30][31][32].…”

Section: Effect Of Time On the Refractive Index Of Mmumentioning

confidence: 99%

Development of Monomethylol Urea for Coating Application: Effect of Time on Synthesis

Archibong¹

2019

CTBEB

View full text Add to dashboard Cite

Monomethylol Urea (MMU) was synthesis using the one step process, The MMU was characterized and evaluated at different Time interval. The viscosity, density, gel time, elongation at break, Refractive index, Turbidity as well as melting points were observed to either increase or decrease with increasing time interval with their optimal at 60 min. while the formaldehyde emission and moisture uptake decreases with increasing time interval. Observations on solubility test shows that MMU resins were soluble from 0-60 min time interval beyond which it becomes insoluble, this is an indicator to the paint formulator that above this time interval, MMU cannot be used for paint formulation.

show abstract

Reactive extrusion of polypropylene/polystyrene blends with supercritical carbon dioxide

Cited by 15 publications

References 29 publications

Comparison of different modeling methods toward predictive capability evaluation of the bonding strength of wood laminated products

Comparison of different modeling methods toward predictive capability evaluation of the bonding strength of wood laminated products

Effect of Different Compatibilization Systems on the Rheological, Mechanical and Morphological Properties of Polypropylene/Polystyrene Blends

Development of Monomethylol Urea for Coating Application: Effect of Time on Synthesis

Contact Info

Product

Resources

About