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<p>The traditional hot melt adhesives have been widely used in automotive, textile, electronics and other fields, but the raw materials for their preparation are overly dependent on fossil energy. Chlorinated poly(propylene carbonate) (CPPC) as a new kind of hot melt adhesive seems to be one strategy to solve this problem. However, improving the comprehensive properties of CPPC-based hot melt adhesives is still a challenge. In this work, CPPC and poly(butylene succinate) (PBS) were melt blended using diphenylmethane diisocyanate (MDI) as a chain extender. FTIR and GPC confirmed that chain extension occurred between the two polymers and MDI. SEM micrographs showed chain extension improved the compatibility of CPPC/PBS blends. The thermal stability, storage modulus (G′), complex viscosity (|η*|), mechanical and adhesive properties of CPPC/PBS/MDI blends were improved upon adding MDI. The tensile strength and lap shear strength of the CPPC/PBS/MDI (80/20/1.25) blend reached 41.9&#xa0;MPa and 6.24&#xa0;MPa, respectively, which were 2.5 and 2.0 times that of the CPPC/PBS (80/20) blend. The CPPC/PBS/MDI (30/70/1) blend exhibited good adhesive properties with a lap shear strength of 10.19&#xa0;MPa. Thus, CPPC/PBS/MDI blends with better thermal stability, mechanical and adhesive properties exhibited potential application in environmentally friendly hot melt adhesives.</p>

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Preparation and properties of chlorinated poly(propylene carbonate) and poly(butylene succinate) blends as hot melt adhesives through chain extension reaction

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Wenqiang Mao,
  • Yanxiong Pan,
  • Xiangling Ji,
  • Wei Jiang

摘要

The traditional hot melt adhesives have been widely used in automotive, textile, electronics and other fields, but the raw materials for their preparation are overly dependent on fossil energy. Chlorinated poly(propylene carbonate) (CPPC) as a new kind of hot melt adhesive seems to be one strategy to solve this problem. However, improving the comprehensive properties of CPPC-based hot melt adhesives is still a challenge. In this work, CPPC and poly(butylene succinate) (PBS) were melt blended using diphenylmethane diisocyanate (MDI) as a chain extender. FTIR and GPC confirmed that chain extension occurred between the two polymers and MDI. SEM micrographs showed chain extension improved the compatibility of CPPC/PBS blends. The thermal stability, storage modulus (G′), complex viscosity (|η*|), mechanical and adhesive properties of CPPC/PBS/MDI blends were improved upon adding MDI. The tensile strength and lap shear strength of the CPPC/PBS/MDI (80/20/1.25) blend reached 41.9 MPa and 6.24 MPa, respectively, which were 2.5 and 2.0 times that of the CPPC/PBS (80/20) blend. The CPPC/PBS/MDI (30/70/1) blend exhibited good adhesive properties with a lap shear strength of 10.19 MPa. Thus, CPPC/PBS/MDI blends with better thermal stability, mechanical and adhesive properties exhibited potential application in environmentally friendly hot melt adhesives.