One‐step preparation of black polystyrene particles via in situ suspension polymerization

Abstract

A facile one‐step technique of preparing black polystyrene (PS) was developed by in situ suspension polymerization in which polymerization of styrene was conducted in the presence of modified carbon black (CB). A series of uniform black PS particles had been synthesized with this method. Morphology and dispersion stability of the various CBs were investigated by both scanning electron microscopy and spectrophotometric analysis. The results of thermogravimetric analysis indicated that the thermal stability of PS was significantly enhanced by introducing modified CB. In addition, the PS synthesized in the absence or presence of modified CB possessed a narrow molecular distribution, as was characterized by gel permeation chromatography. Compared with the conventional mechanical blending technique of PS and CB, our present technique could not only avoid the drawback of poor miscibility between the CB and PS, but also simplify the synthesis technique. Scanning electron microscopy micrographs of the resulting black PS demonstrated that modified CB was well dispersed in the PS matrix. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

Preparation of heat resisting poly(methyl methacrylate)/graphite composite microspheres used as ultra‐lightweight proppants

“…All these characteristics indicate the presence of the ACOOH group. Compared with the spectrum of pure PMMA, the spectrum of PMMA/graphite composite microsphere [ Figure 3(c)] at 1450-1650 cm 21 arose sight offsets and the intensity of the peak at 698 cm 21 was obviously weakened, which was contributed to the interaction between PMMA and graphite. 23 Furthermore, compared with the raw graphite [ Figure 3(a)], the characteristic peaks in the spectra of pure PMMA and PMMA/graphite do not appear in the curve of raw graphite, implying the successful preparation of PMMA/graphite composite particles.…”

“…22 The peaks at 1000-1200 cm 21 are attributed to the stretching vibration of the CAO group of PMMA. In addition, in the range of 2600-3300 cm 21 , a broad and strong AOH absorption band appears, at the same time, the peaks at 1706-1720 and 1210-1320 cm 21 are attributed to the stretching vibration of C@O and CAO, respectively. All these characteristics indicate the presence of the ACOOH group.…”

“…The better the graphite disperse in water the smaller transmittance it shows. 21 Figure 2 showed the dispersion stability of original graphite before and after modified in aqueous solution. As shown in Figure 2, the transmittance of original graphite dispersed in water significantly increased with the standing time, due to the settlement of graphite.…”

Effects of triphenyl phosphate on styrene suspension polymerization process and flame retardance properties of polystyrene/triphenyl phosphate nanocomposite

“…Polymerization procedure PS nanocomposites were synthesized by suspension polymerization, following the basic method and recipe ( Table 1) described previously [18,19], with some minor experimental adaptations. Suspension polymerization was carried out in a 500-mL jacketed glass reactor, under atmospheric pressure.…”

“…In previous studies, additives such as layered double hydroxides (LDHs) [17], carbon black [18,19], montmorillonite (MMT), and so on [20] were modified firstly in order to increase compatibility with monomers, and well-dispersed polymer composites were obtained via suspension polymerization. In addition, the reaction system was more stable.…”