Chain structure comparison of two low density polyethylene resins fractionated by temperature rising elution fractionation and thermal fractionation

Binary Pectin-Chitosan Composites for the Uptake of Lanthanum and Yttrium Species in Aqueous Media

“…For example, activated PAN/CNS-70 NFMs used carbon nanospheres with large surface areas to support dense levels of carboxyl groups for high uptake of La 3+ [34]. Similarly, PAA-grafted adsorbents also showed high La 3+ uptake capacity [35,36]. A key difference between PAA and pectinbased biopolymers is the much higher density of -COOH groups in the case of PAA (ca.…”

Zinc chloride promoted the inimitable dissolution and degradation of polyethylene in a deep eutectic solvent under white light

“…The versatile properties of polyethylene (PE) (stability, low cost, durability, light weight, and strength), a high molecular weight hydrocarbon polymer, 1,2 lend it a wide range of applications [3][4][5] depending upon the type of PE. [6][7][8] The ever increasing usage of PE 9,10 led to various environmental issues via its accumulation in the marine and terrestrial environment (250 million ton per year), [11][12][13] due to its non-biodegradability under environmental conditions. Therefore, various processes such as incineration, landfill, pyrolysis and other recycling techniques 8,[10][11][12][13][14] have been developed for the disposal of PE.…”

Clarifying the effects of comonomer distribution between short and long chains on physical and mechanical properties of ethylenic copolymers

“…[ 31–35 ] For example, it has been proved that introducing a small amount of 1‐butene into the structure of polyethylene chains can improve its resistance against brittle failures. [ 19–21,36–39 ]…”

“…[12] α-Olefinic monomers are usually copolymerized with olefinic monomers to modulate the properties of the final copolymers. [13][14][15][16][17][18][19][20][21] The short-chain branch (SCB) density can be considered one of the most critical factors that govern both the structural and end-use properties of commercial LLDPEs. [22][23][24][25] For example, it has been commonly accepted that the incorporation of α-olefinic monomers (1-butene, 1-hexene, and 1-octene) can change the balance between crystalline and amorphous structures of polyolefines.…”

“…[31][32][33][34][35] For example, it has been proved that introducing a small amount of 1-butene into the structure of polyethylene chains can improve its resistance against brittle failures. [19][20][21][36][37][38][39] Many valuable efforts have been made in the last decades to synthesize modern catalysts for the polymerization of olefins. [40] The central goal of the activities has been a more homogeneous introduction of comonomers into polymeric chains.…”