We studied the morphological, mechanical, and rheological properties of polycarbonate (PC) and poly(acrylonitrile-butadiene-styrene) (PolyABS) blends with different types of compatibilizer. Styrene-acrylonitrile-maleic anhydride terpolymer (SAM) was used as a compatibilizer of the blends. For comparison, styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG) was also used as a compatibilizer. For the PC-PolyABS (70/30 wt %) blends with SAM, the mechanical strength and complex viscosity reached a maximum when the SAM concentration was 5 phr. The mechanical and rheological results of the blend were consistent with the morphological result that the PolyABS domain size reached a minimum when the SAM content was 5 phr. The interfacial tension (a) of the blend was compared with the compatibilizer type and content, which were calculated by the Palierne emulsion model with the relaxation time of the PC-PolyABS blend. The a is consistent with the morphological and mechanical properties of the PC-PolyABS blend. The results of the morphological, mechanical, and rheological properties of the blend suggest that SAM was a more effective compatibilizer than SAG, and the optimum compatibilizer content of SAM was 5 phr. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46418.
Rigid polyurethane foams (PUFs) were prepared from polymeric 4,4Ј-diphenylmethane diisocyanate, polyester polyol, 1,4-butane diol, silicone surfactant, hydrochlorofluorocarbon (HCFC) 141B, and distilled water. The properties and structure of the PUFs were investigated with differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and a universal testing machine. The density of the PUF blown by distilled water and/or HCFC 141B decreased from 175.7 to 28.2 kg/m 3 with an increase of blowing agents. From the SEM results, the average cell size of the PUF blown by distilled water increased from 150 to 290 m with the distilled water content. From the DSC results, the glass-transition temperature (T g ) of the PUF blown by distilled water increased from 85.7 to 101.7°C with increasing distilled water content, whereas the T g of the PUF blown by HCFC 141B remained unchanged with HCFC 141B content. The compressive strength and modulus of the PUF blown by a mixture of distilled water and HCFC 141B was increased from 0.13 to 0.25 MPa and from 3.00 to 7.23 MPa, respectively, with the distilled water content at the sample density of about 44.0 kg/m 3 . The increase of the compressive strength and modulus of the PUF at the same density was related to the increase of the T g from 86.0 to 100.9°C.
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