Novel halogen-free flame retardants based on adamantane for polycarbonate

Abstract

The surface of PC/FR compositions presents a continuous and protective carbon layer with several bubbles and folds.

Biodegradable Redox-Sensitive Star Polymer Nanomicelles for Enhancing Doxorubicin Delivery

“…1,3,5,7-Tetrahydroxyadamantane (AD-(OH) 4 ) was prepared according to the reported literature [23]. DL-LA, GA, pentaerythritol (PT), stannous octoate (Sn(Oct) 2 ), pyrene, N,N-dimethylformamide (DMF, 99.9%, extra dry, water ≤ 30 ppm), 3,3 -dithiodipropionic acid, and triethylamine were purchased from Energy Chemical (Shanghai, China).…”

Synthesis of thermochemically stable tetraphenyladamantane-based microporous polymers as gas storage materials

“…3), and exhibit decomposition temperatures over 600 C. Clearly, the introduction of the rigid adamantane unit has enhanced the thermal stability of our target polymers. 19,22 Moreover, the higher the adamantane content, the better the thermal stability. For example, the molar ratio of adamantane between MOP-Ad-1 and MOP-Ad-3 is 22.45% and 14.80%, and we found that MOP-Ad-1 was more stable (up to 520 C) than MOP-Ad-3 (up to 480 C).…”

“…Adamantane and its derivatives, a class of unique compounds with a relatively rigid three-dimensional framework and high physicochemical stability, 19,20 have been employed as suitable building blocks in the preparation of thermostable microporous polymers. 21,22 For instance, Han and co-workers 15 reported networks of hexakis(4-bromophenyl)benzene and diethynylbenzene (HPOP-2), synthesized via Sonogashira coupling, possessed a high Brunauer-Emmett-Teller (BET) surface area of 742 m 2 g À1 but degraded around 280 C. In contrast, Chang et al 18 designed and synthesized novel MOP materials in the same way and all reagents except that 1,3,5,7-tetrakis(4-iodophenyl)adamantane were used in place of hexakis(4-bromophenyl)benzene, showing a high BET surface area (up to 665 m 2 g À1 ) and a degradation temperature around 340 C. They attributed the enhanced thermal stability to the introduction of adamantane into the molecular structure.…”

1,3-Bis(1,2,4-triazol-1-yl)adamantane

“…Other types of biological activities of adamantane derivatives have also been reported [5][6][7]. They find use in polymer synthesis [8], the design of nanostructured materials [9,10], ionic liquids [11], and coordination chemistry [12,13]. In addition, arrangement of azoles around a rigid linker makes azolyladamantanes perfect auxiliary ligands for metal-organic framework design; however, only a few examples of such ligands (with 4H-1,2,4-triazolyl and tetrazolyl moieties) have been reported [14][15][16][17][18].…”