Polydimethylsiloxane, methacryloxypropyl terminated; 4 - 6 cSt

Jung, Ho Yong, et al. Journal of Vacuum Science & Technology B 27.4 (2009): 1861-1864.

Polydimethylsiloxane, methacryloxypropyl terminated (M-PDMS)-based UV-curable liquid-phase imprinting resin and polyvinyl alcohol PVA bottom layer were applied to double-layer UV-NIL for a high-fidelity lift-off process. The M-PDMS-based imprinted resist pattern showed high etch resistance to O2 plasma, and the undercut pattern profile of the PVA bottom layer for the lift-off process was formed by the O2 RIE process. The size and shape of the imprinted resist pattern barely changed during PVA underlayer etching with O2 RIE. High corrosion resistance using double-layer UV-NIL and M-PDMS-based imprinting resin. High O2 RIE etch selectivity of the imprinted resist pattern to the underlying layer is necessary to create the undercut pattern profile, which is critical for a stable lift-off process.
Water-soluble polyvinyl alcohol PVA was used as the base layer of the double-layer UV-NIL. The UV-curable resin used in this study was formulated to meet requirements such as high O plasma etchability, good adhesion to the underlying layer, and low viscosity to minimize residual layers after the imprinting process. The composition of the imprinting resin is 94 wt% polydimethylsiloxane, methacryloxypropyl terminated as the base resin. 3 wt% UV initiator and 3 wt% methacryloyloxypropyltrichlorosilane, which can combine with the hydroxyl groups on the PVA bottom layer to improve the adhesion between the resin and the substrate.

Lejars, Marlene, André Margaillan, and Christine Bressy. Polymer Chemistry 4.11 (2013): 3282-3292.

The synthesis of graphite copolymers based on hydrolyzable tert-butyldimethylsilyl methacrylate(TBDMSiMA) and Polydimethylsiloxane, methacryloxypropyl terminated(PDMSMA) was effectively controlled by RAFT polymerization using 2-cyanoprop-2-yl-dithiobenzoate (CPDB) as a chain transfer agent. Graphite copolymers with molecular weights close to theoretical values and narrow unimodal distribution were obtained. Different distributions of PDMS side chains along the main chain were obtained depending on the simultaneous or sequential polymerization of TBDMSiMA and PDMSMA and the order of monomer addition. DSC analysis demonstrated the influence of copolymer structure and PDMS side chain length on the thermal behavior of graphite copolymers. All graphite copolymers showed good film-forming properties, low surface energy and erosion resistance in artificial seawater, making them suitable as novel polymer binders for hybrid self-polishing/de-scaling coatings.
Polymerize TBDMSiMA and then add PDMSMA macromonomer to the reaction mixture to synthesize pTBDMSiMA-b-pPDMSMA diblock copolymers with pTBDMSiMA-CPDB homopolymer as macro-CTA. A typical example is as follows: TBDMSiMA (4.5 g, 22.5 mmol), CPDB (102 mg, 0.5 mmol) and AIBN (15 mg, 0.1 mmol) were dissolved in xylene in a 100 mL round-bottom flask equipped with a magnetic stirring bar, and the volume of the solution was adjusted to 20 mL. The reaction mixture was degassed by bubbling with argon, sealed, and then placed in an oil bath preheated to 70 °C for 24 h. A sample of 1 block of the reaction mixture was taken out using a degassed syringe to check the monomer conversion by H-. Considering the previously determined dn/dc value of pTBDMSiMA at 0.070 mL g, NMR, and the molecular weight and polydispersity values measured by TD-SEC. Then, 15 mL of a previously degassed solution of PDMSMA1k (4.6 mg, 53 mmol) and AIBN (15 mg, 0.1 mmol) in xylene was added to the reaction mixture. The polymerization was allowed to proceed for a further 48 h. The polymer was precipitated into methanol, filtered and dried under vacuum at room temperature for 24 h. The final molecular weight and polydispersity values were determined by TD-SEC, taking into account the dn/dc values calculated for each precipitated polymer.

Ogliani, Elisa, et al. RSC advances 8.15 (2018): 8285-8291.

Magnetic field-triggered self-healing of a novel thermoplastic silicone elastomer, P(PDMSMA-co-UPyMA), is reported, which is produced by free radical polymerization of polydimethylsiloxane, methacryloxypropyl terminated (PDMSMA) and UPyMA monomers. This novel copolymer exhibits thermoplastic properties due to the reversible nature of the UPy self-associating dimers. The self-healing of the material was activated by direct heat supply as well as remote induction heating. Remotely controlled healing has been demonstrated by exposing the composites containing 20 wt% Fe3O4 particle filler to AMF. Moreover, the elastomer can be reshaped multiple times without showing significant chemical or physical degradation. Therefore, this novel material can be considered as an excellent candidate for recyclable silicone elastomers. Moreover, the described self-healing method, using the same conditions, has been applied to the previously reported material P(MEAco-UPyMA). The P(PDMSMA-co-UPyMA) and P(MEA-coUPyMA) copolymers exhibit the same self-healing capabilities.
PDMSMA (0.97 mL, 0.43 mmol), AIBN (23 mg, 0.14 mmol), DMF (3.6 mL) and 1,4-dioxane (3.6 mL) were added to a Schlenk tube along with the comonomer UPyMA (302 mg, 1.08 mmol). The reaction mixture was stirred and deoxygenated by bubbling nitrogen through it for 45 min. The tube was then immersed in an oil bath at 90 °C and the polymerization was allowed to proceed for 24 h. Thereafter, the tube was removed from the bath and the reaction mixture was exposed to air. It was then precipitated twice from THF in a methanol-deionized water (3:1) mixture. The product was dried in a vacuum oven until no residual solvent was detected by spectroscopic means (yield > 60%)