Characterization of rubber phase in acrylonitrile–butadiene–styrene polymers

Abstract

The performances of rubber-toughened polymers like acrylonitrile-butadiene-styrene (ABS) are strongly affected by the type and amount of rubber phase. Characterization of rubber phase is an effective method to predict and control the physical and mechanical behaviors of ABS materials. In this work, different methods have been employed to determine the amount of rubber phase in ABS polymers. The first method was based on thermogravimetry using a particular step degradation of the polymer. In the second method, characteristic absorption bands in the Fourier transform infrared spectra were used to make a calibration curve to determine the rubber content of unknown ABS samples. The third method was based on variation of heat capacity of ABS polymers with increasing the rubber phase content. In the fourth method, a two-step solvent extraction followed by centrifuging was used to separate the rubber particles of different ABS samples. Separation of hardened rubber particles was used to study the size and size distribution of rubber particles.

Effect of the matrix plasticization behavior on mechanical properties of PVC/ABS blends

“…Figure 2 shows the Izod impact strength plotted against the PB rubber content for the different PVC/ABS blends prepared at milling temperatures of 165°C and 180°C. The impact strength of blends increased together with the PB rubber content as expected from previous studies [14,17,18]. At low PB rubber contents, all of the notched impact strength of brittle blends occurred in the range of 50-200 J/m, independent of the type of PVC resin used.…”

Reprocessing of chromed ABS parts with chemical pickling and new chrome plating

“…In the spectra of Figure , absorbance bands appearing at 1450 and 2238 cm −1 are related to acrylonitrile, at 911, 945, and 1157 cm −1 indicate the presence of butadiene at 698, 748, 1456, 1492, 1610, 2915, and 3027 cm −1 (CH bonds) correspond to styrene . In the sample of virgin ABS (AM_00) and in the other samples chromed and pickled in hydrochloric and nitric acids, there are presence of an absorption band in 3250 cm −1 , characteristics of OH bonds, which are corresponding to the intramolecular hydrogen bonds.…”

Study on the effective process parameters influencing styrene and acrylonitrile grafting onto seeded polybutadiene latex

“…The samples were dried in a vacuum oven at 50°C for at least 24 h and then weighed to determine the solid percentages, corrected for the fraction of the PB and the emulsifier. To analyze grafting,14 samples of the coagulated rubber particles were oven‐dried at 50°C for at least 24 h. To swell the rubber and dissolve the ungrafted PB, products were immersed in cyclohexane and held at the boiling point for at least 3 h. Then the product gels, containing free SAN and PB‐g‐SAN, were separated from the cyclohexane solution of PB by filtration through a Buchner funnel and dried for 72 h. To dissolve free SAN, insoluble polymer was added to cold acetone for 3 h and the insoluble polymer/acetone slurry was fully transferred to a plastic centrifuge tube and centrifuged at 10,000 rpm and 0°C for 1 h in a Beckman Avanti J‐25 (USA). The acetone containing the free SAN was transferred into glass vials and dried, first at room temperature and then at 100°C for 1 h, to completely evaporate the acetone and then the samples were weighed.…”