Rheological and fusion behaviors of PVC micro‐ and nano‐composites evaluated from torque rheometer data

Abstract

The effects of calcium carbonate (CaCO3) particle size on the fusion and rheological behaviors of rigid poly(vinyl chloride) (PVC) composites prepared in a Haake torque rheometer were investigated by means of torque data recorded during processing. Increasing the number of particles in the same blend volume by decreasing the particle size resulted in increasing frictional forces. This increase led in turn to increased fusion torque and decreased fusion time and temperature. The power‐law‐index values of the composites increased with decreasing particle size except for 25‐nm CaCO3. The viscosities of all composites were found to decrease with shear rate; therefore, high pseudoplasticity was observed. At a particular rotor speed, viscosity of the composites decreased with decreasing particle size except for 25‐nm CaCO3. The overall results showed that the particle size of CaCO3 altered the fusion characteristics and rheological behavior of PVC. J. VINYL ADDIT. TECHNOL., 2010. © 2010 Society of Plastics Engineers

Investigation into the mechanical and thermal properties of poly(methyl methacrylate) recovered from light guidance panels with a focus on future remanufacturing and sustainable waste management

“…The v-PMMA material shows 39.30 Nm and 5.22 Nm higher maximum torque value and average torque value respectively, though a contrary higher result was shown by r-PMMA for higher maximum torque value (45.40 Nm) and average torque value (10.59 Nm). r-PMMA material shows higher torque value as compared with the v-PMMA, which is perhaps due to chain stiffness of materials, or various fillers incorporated during its previous life cycle, as the small amount of the fillers can moderately influence the torque value [32]. However, possibility for presence of such fillers is void in our case since PMMA materials used in LGPs are used without any additives inorder to maintain its superior optical clarity.…”

Optimization of fusion behavior of the nanocomposites based on poly(vinyl chloride)/poly(epichlorohydrin‐co‐ethylene oxide)/organoclay

“…Furthermore, investigation of the fusion phenomenon in the PVC resin reinforced with SiO 2 and CaCO 3 suggests that FT relies on particle size of the fillers. In other words, the filler with smaller particle size provides lower FT . The structural and physical properties of the PVC are also influential in the fusion phenomenon.…”

Influence of filler loading and palm oil‐based green coupling agent on torque rheological properties of polypropylene/cocoa pod husk composites

“…[23,24] For this reason, the rheological information of thermoplastic composites is important for parameter optimization and troubleshooting of compounding process as well as equipment design. [27,28] The torque rheometer relates the rheological properties of polymeric materials by measuring change in the torque due to the change of melt viscosity during compounding, and the effect of various additives on the process ability of thermoplastic. Haake Buchler and Bradender are the only few companies which produce torque rheometer.…”

“…[25,26] Torque rheometer is one of the important rheological measuring equipments that offer a platform to monitor the rheological behavior of thermoplastic materials in an actual compounding condition. [28] The author's past research was focused on the effect of green coupling agent from palm oil (GCA-P) on mechanical properties of PP/CPH composites. [27,28] The torque rheometer relates the rheological properties of polymeric materials by measuring change in the torque due to the change of melt viscosity during compounding, and the effect of various additives on the process ability of thermoplastic.…”

“…[27,28] The torque rheometer relates the rheological properties of polymeric materials by measuring change in the torque due to the change of melt viscosity during compounding, and the effect of various additives on the process ability of thermoplastic. [28] The author's past research was focused on the effect of green coupling agent from palm oil (GCA-P) on mechanical properties of PP/CPH composites. [8] In present research, the rheological properties of PP/CPH composites at different filler loading and addition of GCA-P are reported.…”