Processes for coating surfaces with a copolymer made from sulfur and dicyclopentadiene

Abstract

The reaction between sulfur and dicyclopentadiene was optimised to form a shelf stable and soluble low molecular weight oligomer. After a simple curing process at 140 °C the material was...

Inverse vulcanised sulfur polymer nanoparticles prepared by antisolvent precipitation

“…Taking poly(S-DCPD) as an example, the mercury capacity of SDCPD-50,50-250 in static testing (C 0 ¼ 10 ppm) has reached to 19.1 mg g À1 , much higher than that of S-DCPD (0.1 mg g À1 , C 0 ¼ 2 ppm), 8 saturation capacity of salt templated of S-DCPD (2.27 mg g À1 ), 29 and saturation capacity of S-DCPD coated silica gel (5 mg g À1 ). 27 Similarly, SPD-50,50,00-250 has much higher mercury capacity (19.5 mg g À1 , C 0 ¼ 10 ppm) than its counterpart bulk materials (0.05 mg g À1 , C 0 ¼ 2.5 ppm). 13 Not only performed better than same component bulk polysulde, in mercury uptake application, these novel nanoparticles were also comparable to other polysuldes synthesized by other crosslinkers, such as poly (S-r-canola) (1.81 mg g À1 ), 38 poly (S-rrice bran) (1.92 mg g À1 ), 38 poly(S-r-castor) (2.01 mg g À1 ), 38 and poly(sulfur-GOB-DCPD) (1.60 mg g À1 C 0 ¼ 20 ppm).…”

“…To this end, typical strategies involve coating polymers onto particles or substrates, 16,24,25,27 electrospinning bres blended with other polymers, 28 templating by salt, 29 or foaming the inverse vulcanised polymer with supercritical CO 2 to generate porous structures. 30 Almost all of these methods used auxiliary materials to support sulfur polymers and increase their surface area.…”

“…In this application the morphology of inverse vulcanised polymers is crucial because the higher the specific surface area of materials, the larger contacted interface adsorbents can provide to the adsorbates. To this end, typical strategies involve coating polymers onto particles or substrates, 16,24,25,27 electrospinning fibres blended with other polymers, 28 templating by salt, 29 or foaming the inverse vulcanised polymer with supercritical CO 2 to generate porous structures. 30 Almost all of these methods used auxiliary materials to support sulfur polymers and increase their surface area.…”

Getting the Terms Right: Green, Sustainable, or Circular Chemistry?

“…In other words, it has been prioritized to identify sustainable building blocks that provide monomers already in use or polymers that are functional equivalents to existing macromolecules. In this regard, polymers made from elemental sulfur have emerged as a new class of materials useful in several applications [ 32 ] as they are postulated to be green in their preparation and use. [ 33 ] In fact, the preparation of sulfur polymers is an innovative example of waste valorization given the fact that elemental sulfur is known for its globally distributed raw material reserves as a by‐product of the petroleum industry.…”

Modelling mercury sorption of a polysulfide coating made from sulfur and limonene

“…7,9 Additionally, there has been a resurgence in methods to make polymers from sulfur, [10][11][12][13][14] which has created many opportunities for using these low-cost and scalable polymers in mercury and heavy metal remediation. 7,[15][16][17][18][19][20][21][22][23][24][25][26] In this study, we investigated one of these sulfur polymers made by direct copolymerisation of elemental sulfur with the renewable terpene limonene. Our lab first reported the synthesis and use of this material in mercury remediation in 2015, 27,28 describing its advantageous features.…”