Effects of Magnesia Incorporation on Properties of Polystyrene/Magnesia Composites

Hachani, Salah Eddine; Wis, Abdulmounem Alchekh; Necira, Zelikha; Nebbache, Nadia; Meghezzi, Ahmed; Özkoç, Güralp

doi:10.17344/acsi.2018.4305

Cited by 17 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The second decomposition bands for both copolymers surely belong to the styrene fragments. The onset of the decomposition temperature for the neat polystyrene was reported as 372 °C [31] . However, in our study, the onsets of decomposition temperature for the copolymers were observed as about 325 °C.…”

Section: Resultscontrasting

confidence: 66%

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

et al. 2022

View full text Add to dashboard Cite

3‐hydroxypropionate moieties grafted polystyrene [poly(S‐g‐3HP)] was prepared by sequentially applying the hydrogen‐transfer polymerization (HTP) and the free‐radical polymerization (FRP) via “grafting through” strategy. For this purpose, oligomeric poly(3‐hydroxypropionate) with vinyl end‐group (P3HP) was prepared via HTP of acrylic acid in the presence of tNaBuO as an alkaline catalyst. Then, the oligomeric P3HP was used as a comonomer in the FRP of styrene yielding the poly(S‐g‐3HP) copolymer, namely chemically modified polystyrene. 1H‐NMR, FTIR, DSC, TGA, GPC, and MALDI MS techniques were applied to confirm the structures of both the oligomer and modified polystyrene. Glass transition temperatures of the modified polystyrene samples were found to be decreased from 103 to 84 °C depending upon the amount of 3‐hydroxypropionate (3HP) moieties. Solution‐cast films were prepared by the polystyrene homopolymer and modified polystyrenes. The contact angle values were determined to decrease gradually from 87.5 to 53.7° with increasing the amount of the 3HP moiety grafted polystyrene.

show abstract

Section: Resultscontrasting

confidence: 66%

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

et al. 2022

View full text Add to dashboard Cite

show abstract

“…PS with a flat surface is hydrophobic and has a water CA of 94°, while a honeycomb surface has a water CA of 107° due to the increase in surface roughness, 43 and consequently, particles coated with PS have a hydrophobic surface. Hachani et al 44 studied the wettability of PS/magnesia (MgO) composites and observed that the addition of magnesia particles to the PS matrix increased the wettability. That is, while the CA value of PS was 91.5°, this value decreased to 75.5°–86.8° for magnesia composites.…”

Section: Resultsmentioning

confidence: 99%

Polystyrene waste‐modified epoxy/nanoclay and hybrid composite coatings

Özmeral

Kocaman

Soydal

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, phenolic novolac-type epoxy (EPN) resin was modified with 4 wt % thermoplastic polystyrene (PS) waste and was used as the polymer matrix for the first time. Two types of composites were prepared: (i) nanocomposites with 1-3 wt% nanoclay (NC) and (ii) hybrid composites. Pristine (NC) and tetramethylammonium chloride modified nanoclays (MNC) were used at a 2 wt% ratio in hybrid composites with 25-35 wt% red mud waste (RMW). The corrosion protection properties of the coatings were determined by immersion test in 5 wt% NaOH, HCl, and NaCl solutions. The water sorption of hybrid composites varied between 1%-3.6% and 1%-5.3%, while it was between 0.82% and 1.02% in EPN-PS/NC nanocomposites. The weight gain percentage values of hybrid composites in corrosive media for the base and salt solutions were determined much lower (0.59%-0.75% and 0.46%-0.59%, respectively) than water sorption. Surface morphologies of hybrid composites were examined by scanning electron microscopy before and after corrosion tests. MNC-30 wt% RMW hybrid composite was found more suitable due to high corrosion resistance in basic and salty environments, storage modulus, loss modulus, and glass transition temperature (T g ) values (90.6 C) as compared with NC-30 wt% RMW hybrid composite.

show abstract

“…They confirmed that exceeding the temperature of 200 causes the formaldehyde relived from the dimethylene ether groups, which breaks the polymer chain. Thermogravimetric analysis (TGA) for pure PS was conducted by [41]. They confirmed that weight loss reaches 50% at 426.7 • C and 75% weight loss at 437.1 • C. Taking into account the literature data of the UF, PS resin and the obtained results for PLA and PCL, it can be concluded that the lowest thermal stability is achieved by the industrial resin, while PS and PCL weight loss reaches 80% at over 400 • C. DSC curves showed an endothermic melting process at 59.06 • C and 175.25 • C for PCL and PLA, respectively.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Functional Features of Lignocellulosic Particle Composites Containing Biopolymer Binders

2021

View full text Add to dashboard Cite

In this research, the assessment of the impact of natural biopolymer binders on selected mechanical and physical properties of lignocellulosic composites manufactured with different resination (12%, 15%, 20%). Different mechanical and physical properties were determined: modulus of rupture, modulus of elasticity, internal bonding strength, thickness swelling, water absorption, contact angle, and density profile. Moreover, thermal properties such as thermogravimetric analysis and differential scanning calorimetry were studied for the polymers. The results showed significant improvement of characterized features of the composites produced using biopolymers. However, the rise of the properties was visible when the binder content raised from 12% to 15%. Further increase of biopolymer binder did not imply a considerable change. The most promising biopolymer within the tested ones seems to be polycaprolactone (PCL).

show abstract

Effects of Magnesia Incorporation on Properties of Polystyrene/Magnesia Composites

Cited by 17 publications

References 19 publications

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

Polystyrene waste‐modified epoxy/nanoclay and hybrid composite coatings

Evaluation of Functional Features of Lignocellulosic Particle Composites Containing Biopolymer Binders

Contact Info

Product

Resources

About