The mechanism of co-oligomerization of tetrahydrofuran with propylene oxide in the presence of methacrylic anhydride

Берлин, А. А.; Turovskaya, L.N.; Matveyeva, N.G.

doi:10.1016/0032-3950(77)90099-5

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…The tetrahydrofurane-epoxide copolymer is a type of block polyether and is mostly synthesized by the cationic ring opening polymerization of tetrahydrofurane and epoxides including ethylene oxide (EO) [3], propylene epoxide (PO) [4], epichlorohydrin (ECH) [5,6,7], and cyano EO [8,9,10]. Generally, these copolymers, especially PPO-PTMG multiblock copolymers, possess a medium molecular weight (2000–4000 Dalton) [11,12]. This condition results from the fact that the further chain propagation of copolymers is inhibited by the low ring opening reactivity of tetrahydrofurane [13,14,15] and the chain transfer of cationic ring opening polymerization [16].…”

Section: Introductionmentioning

confidence: 99%

Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization

Wang

et al. 2019

Molecules

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The high crystallization at room temperature and high cost of polyoxytetramethylene glycol (PTMG) have become obstacles to its application. To overcome these problems, a segment of PTMG can be incorporated into a block copolymer. In this work, polypropylene (PPO) glycol-polyoxytetramethylene (PPO-PTMG) multiblock copolymers were designed and synthesized through a chain extension between hydroxyl (OH)-terminated PPO and PTMG oligomers. The chain extenders, feed ratios of the catalyst/chain extender/OH groups, reaction temperature, and time were optimized several times to obtain a PPO-PTMG with low crystallization and high molecular weight. Multiblock copolymers with low crystallization and high average molecular weight (Mn = 1.0–1.4 × 104 Dalton) were harvested using m-phthaloyl chloride as the chain extender. The OH-terminated PPO-PTMG multiblock copolymer with high Mn and a functionality near two was further siliconized by 3-isocyanatopropyltrimethoxysilane to synthesize a novel silyl-terminated polyether. This polyether has an appropriate vulcanizing property and potential applications in sealants/adhesive fields.

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Section: Introductionmentioning

confidence: 99%

Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization

Wang

et al. 2019

Molecules

View full text Add to dashboard Cite

show abstract

The mechanism of co-oligomerization of tetrahydrofuran with propylene oxide in the presence of methacrylic anhydride

Cited by 1 publication

References 11 publications

Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization

Polypropylene Glycol-Polyoxytetramethylene Glycol Multiblock Copolymers with High Molecular Weight: Synthesis, Characterization, and Silanization

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