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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

Wei Hu, Lei Wang, Quanyong Wang, Anbo Luan, Yuliang Mai, Linjia Huang, Yongjun Chen, Shijing Yan, Wenjie Xiong

Molecules. 2019 Nov 26;24(23):4317.

PMID: 31779185

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP25322694-A	Polypropylene glycol		25322-69-4	Price

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