Effect of copolymerized ethylene unit on the crystallization behavior of poly(propylene-co-ethylene)s

Numerical evaluation and improvement efficiency of radial flow moving‐bed reactors for catalytic pyrolysis of light hydrocarbons to low carbon olefins

“…[1][2][3][4] In general, two common processes for producing light olefins are steam pyrolysis of naphtha, and catalytic cracking of heavy oil. [5][6][7][8][9][10][11] However, steam pyrolysis and catalytic cracking suffer from high energy consumption and low yield of light olefins, respectively.…”

“…However, most of them focused on fixed bed reactor or fluidized bed reactor (FBR) experiments. [5][6][7][8][9][10][11] Basu and Kunzru [7] investigated thermal pyrolysis and catalytic pyrolysis of naphtha in a fixed bed reactor. Sang et al [12,13] studied the catalytic pyrolysis of naphtha over a KVO 3 /a-Al 2 O 3 catalyst in a vacant tube reactor.…”

PP-CBW/m-LLDPE/micro-CaCO3 composite films manufactured from bumper waste by blown film extrusion

“…As one of the most important microfiller, CaCO3 has been widely used in polyolefins as filler because of its low price, commercial availability and substantial improvement in mechanical properties stemming from its spherical shape morphology. Also, due to its high thermal conductivity, CaCO3 shows high improvements in output and hence faster heating and cooling process cycles [9][10][11][12]. The surface of CaCO3 particles is hydrophilic and polar and to improve their applicability as fillers and their adhesion with a non-polar matrix such as olefins, these particles are usually treated with stearic acid.…”

Characterisation of the Chemical Composition Distribution of LLDPE Using Interactive Liquid Chromatography

“…The average chemical composition of a copolymer can be determined by DSC or spectroscopic techniques like Fourier-transform infrared (FTIR) spectroscopy or nuclear magnetic resonance (NMR). [8][9][10][11][12][13][14] However, these techniques alone do not provide information about the CCD. The molar mass distribution of polyolefins is routinely It is demonstrated that copolymers of ethylene with higher 1-olefins can be separated using bare silica gel as the stationary phase and a gradient of ethylene glycol monobutyl ether and 1,2,4-trichlorobenzene as the mobile phase at 160 8C.…”

“…The properties of copolymers change due to their comonomer content from crystalline (low‐comonomer content) to amorphous (high‐comonomer content). The average chemical composition of a copolymer can be determined by DSC or spectroscopic techniques like Fourier‐transform infrared (FTIR) spectroscopy or nuclear magnetic resonance (NMR) 8–14. However, these techniques alone do not provide information about the CCD.…”