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共聚-接枝连续聚合构建PVAc基高性能核壳乳液及其胶接构效特性研究

批准号31570557 学科分类重组木材 ( C160303 )
项目负责人李志国 负责人职称副教授 依托单位东北林业大学
资助金额63.00
万元
项目类别面上项目 研究期限2016 年 01 月 01 日 至
2019 年 12 月 31 日
中文主题词反向结构核壳乳液;共聚-接枝连续聚合;过渡层结构;耐水煮胶接;单组份API胶黏剂
英文主题词Inverse Core-Shell Structured Emulsion;Copolymerizing-grafting Successive Polymerization;Transition-layer Structure;Boiled water-resistance Bonding;One-component API Adhesive

摘要

中文摘要 为满足饰面用薄木、单板等胶接木制品生产制造过程中对于低成本、高性能胶黏剂的实际需求,本项目提出了一种基于共聚-接枝连续聚合构建单组份高性能PVAc基核壳乳液的设计思想,即在基本不改变传统乳液聚合工艺的基础上,通过两种过渡层单体的连续聚合,使不同性质聚合物单体在乳液聚合过程中的自聚反应转化成为壳层单体在PVAc种子乳液外层的包覆生长过程,进而合成单组份室温固化、可耐沸水胶接的PVAc基核壳结构乳液。研究合成工艺与核壳聚合物组成对乳胶粒形态与结构的影响,阐明新型PVAc基核壳结构乳液的设计原则与合成原理;考察过渡层结构对乳胶粒形态与结构的影响,研究乳胶粒形态结构与成膜性能、胶接强度、耐水热性能及固化反应之间的胶接构效关系,为木材胶接用新型高性能乳液胶黏剂的开发与应用奠定理论基础和技术支撑。
英文摘要 In order to meet with low-cost and high-performance demands of wood adhesives in manufacturing glued laminated timber, e.g. decorative veneer, a novel design idea based on copolymerizing-grafting successive polymerization is proposed for fabricating one-component and high-performance poly(vinyl acetate)-based core/shell emulsions, i.e. without changing the basic emulsion polymerization process, successive polymerization of two kinds of transition-layer monomers is utilized to transform the self-polymerization of monomers featuring distinguished properties in the emulsion polymerization to a process that shell monomer is largely polymerized and coated onto PVAc seed particles periphery, forming one-component, ambient-cured, and boiling water-resistance PVAc-based core/shell emulsions. The effect of synthetic technologies and the compositions of core/shell copolymer on the morphology and structure of latex particles will be investigated to elucidate the design discipline and synthetic mechanism of novel PVAc-based core/shell structured emulsions. The effect of transition-layer microstructure on the morphology and structure of latex particles will be explored to reveal the structure-property relationships between latex particle morphology and film-forming properties, bonding strength, water- and heat-resistance properties, and curing mechanism, by which lay the theoretical foundation and technical support for the development and application of novel high-performance emulsion adhesives for glued laminated timber.
结题摘要

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