Poly(ethylene terephthalate) nanocomposites by in situ interlayer polymerization: the thermo-mechanical properties and morphology of the hybrid fibers

Improve the gas barrier property of PET film with montmorillonite by in situ interlayer polymerization

In situ preparation of poly(ethylene terephthalate)-SiO2 nanocomposites

Preparation and characterisation of a novel fire retardant PET/α-zirconium phosphate nanocomposite

Summary: It is a big challenge to improve simultaneously both the flame retardancy and the melt-dripping resistance of polymeric materials such as PET. In this paper, a novel intumescent flame retardant, DPSPB, was synthesized and blended with copolyester PET-co-DDP/O-MMT nanocomposites, which were synthesized by polycondensation of TPA, EG, DDP, and O-MMT. The resulting PET-co-DDP/O-MMT/DPSPB nanocomposites exhibit very good flame retardance and dripping resistance, e.g., LOI = 29, UL-94 V-0. SEM, XRD, and XPS were used to investigate the relationships between the structures and properties of the composites. It is proved that DPSPB offers excellent protection for the structure of nanocomposites, which is responsible for the good anti-dripping properties of the nanocomposites.

Residues of copolyesters after combustion: common nanocomposite residue of PDMN (left) and the novel nanocomposite residue of PDMN/DPSPB (right).

A Novel Phosphorus-Containing Poly(ethylene terephthalate) Nanocomposite with Both Flame Retardancy and Anti-Dripping Effects

Allylester resin tethered to layered silicate was synthesized by in-situ polymerization method and was cured by tert-butylperbenzoate (TBPB) directly. We ascertained the existing of carbonyl and benzyl groups which come from diallyl terephtalate in the gallery of layered silicates using the thermogravimetric analysis (TGA) and FT-IR. The residual weight and new IR peaks of the clay, which is treated by in-situ polymerization, imply that the hydroxy group of intercalant takes part in the polymerization of allylester resin. Also, its nanocomposite was characterized by means of X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD patterns and TEM photographs indicate that the basal spacing (d

 001
 ) of the nanocomposite made by in-situ polymerization is larger than those of the nanocomposite made by a simple mixing.

Synthesis of Allylester Resin Tethered to Layered Silicates by in-situ Polymerization and Its Nanocomposite

Polymer-clay nanocomposite containing the low amounts of clay shows improved physical, mechanical properties. In this study, allyl ester prepolymer was synthesised by reactions of the diallyl terephthalate monomers and the 1,3-butanediol monomers. Nanocomposites of allyl ester prepolymer and the two kinds of the organically layered silicate were prepared by using the intercalation method as well as the in-situ polymerization method using. By varying the amount of clay content, curing conditions, and feeding conditions, the nanocomposite was studied using X-ray diffraction. From XRD results, allyl esterCloisite 30 B nanocomposite made by the in-situ polymerization method shows better exfoliation behavior compared with the intercalation method. It can be said that the transesterification reaction between functional groups (-OH) of intercalant and monomers results in the increased gallery distance. Also mechanical and thermal properties indicate that the dispersity of clay is an important factor for improving physical properties of the nanocomposite.

https://www.cheric.org/PDF/PK/PK28/PK28-2-0177.pdf

Se-Woong Paeng

Papers

Synthesis of Allylester Resin Tethered to Layered Silicates by in-situ Polymerization and Its Nanocomposite

Synthesis and Characterization of Allyl Ester Resin-Layered Silicate Nanocomposite