Sun, Zhonghe; Wang, Mu; Li, Zhi; Choi, Bonnie; Mulder, Roger J.; Feng, Anchao; Moad, Graeme; Thang, San H. published the artcile< Versatile Approach for Preparing PVC-Based Mikto-Arm Star Additives Based on RAFT Polymerization>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is versatile preparing PVC mikto arm star RAFT polymerization.
A versatile approach to the synthesis of migration-resistant poly(vinyl chloride) (PVC) additives is described and a preliminary assessment of their properties is presented. The process involves the synthesis of AB2 3-mikto-arm stars, star-[PVC-block-(polyB);(polyB)2] or star-[PVC;(polyB)2], that contain a reversible addition-fragmentation chain transfer (RAFT)-synthesized PVC segment, to provide compatibility with PVC and good migration resistance, and multiple RAFT-synthesized segments (polyB), where polyB is based on more activated monomer (a styrene or a methacrylate) that contains the functionality required to impart the desired additive properties. The approach to PVC-based stars comprises three steps: (a) synthesis of a hydroxy-functional PVC [X-PVC(OH)n] by RAFT polymerization mediated by a hydroxy-functional xanthate [X-(OH)n], (b) conversion of the X-PVC(OH)n to the corresponding trithiocarbonate, X-PVC-(CDTPA)n, by the Steglich esterification with 4-cyano-4-[(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoic acid (CDTPA), and (c) formation of star polymer additives by RAFT polymerization mediated by X-PVC-(CDTPA)n. The stars prepared include a plasticizer (B = Bu acrylate), a reactive dispersant for use in forming silica nanocomposites (B = 3-methacryloxypropyltrimethoxysilane), UV stabilizers (B = 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate or 2-hydroxy-4-acryloxybenzophenone), and flame retardants (B = 4-vinylbenzyl phosphonate or diethyl(methacryloyloxymethyl)phosphonate). Although much optimization remains to be done, our preliminary study shows that the synthesized mikto-arm star additives can be effective in imparting the anticipated properties to PVC.
Macromolecules (Washington, DC, United States) published new progress about Dispersing agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics