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

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-PT...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2019-11, Vol.24 (23), p.4317
Main Authors: Hu, Wei, Wang, Lei, Wang, Quanyong, Luan, Anbo, Mai, Yuliang, Huang, Linjia, Chen, Yongjun, Yan, Shijing, Xiong, Wenjie
Format: Article
Language:English
Subjects:
Adhesives - chemistry
Biocompatible Materials - chemistry
Block copolymers
Catalysts
Chains
Copolymers
Crystallization
Fourier transforms
Methanol - analogs & derivatives
Methanol - chemistry
Molecular Weight
NMR
Nuclear magnetic resonance
Polyesters - chemistry
Polyethylene Glycols - chemistry
Polymerization
Polymers - chemistry
Propylene Glycols - chemistry
Room temperature
Sealants
Siliconizing
Temperature
Vulcanization
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Summary: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 ( = 1.0-1.4 × 10 Dalton) were harvested using m-phthaloyl chloride as the chain extender. The OH-terminated PPO-PTMG multiblock copolymer with high 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.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules24234317