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首页> 外文期刊>Polymers >Synthesis and Properties of Waterborne Polyurethane (WBPU)/Modified Lignin Amine (MLA) Adhesive: A Promising Adhesive Material
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Synthesis and Properties of Waterborne Polyurethane (WBPU)/Modified Lignin Amine (MLA) Adhesive: A Promising Adhesive Material

机译：水性聚氨酯（WBPU）/改性木质素胺（MLA）胶粘剂的合成及性能：一种有前途的胶粘剂材料

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A series of waterborne polyurethane (WBPU)/modified lignin amine (MLA) adhesives was prepared using MLA as a chain extender by a prepolymer mixing process. A successful Mannich reaction was achieved during the synthesis of MLA by reacting lignin with bis(3-aminopropyl)amine. Higher tensile strength, Young’s modulus, and thermal stability were recorded for WBPU/MLA adhesives with higher MLA contents. The WBPU/MLA adhesive materials were used to coat polyvinyl chloride (PVC) substrates. The adhesive strength increased with increasing MLA content. More importantly, the MLA also enhanced the WBPU/MLA coating in terms of adhesive strength at moderately high temperatures as well as under natural weather exposed conditions. The adhesive strength was essentially unaffected with 6.48 mol % MLA in the WBPU/MLA coating after exposure to natural weather conditions for 180 days.
机译：通过预聚物混合工艺，使用MLA作为增链剂，制备了一系列水性聚氨酯（WBPU）/改性木质素胺（MLA）粘合剂。通过合成木质素与双（3-氨基丙基）胺，在合成MLA的过程中成功完成了Mannich反应。 MLLA含量较高的WBPU / MLA胶粘剂的拉伸强度，杨氏模量和热稳定性更高。 WBPU / MLA粘合剂材料用于涂覆聚氯乙烯（PVC）基材。粘合强度随MLA含量的增加而增加。更重要的是，MLA还提高了WBPU / MLA涂层在适度高温下以及自然暴露于自然条件下的粘合强度。在暴露于自然气候条件下180天后，WBPU / MLA涂层中的6.48 mol％MLA的粘合强度基本上不受影响。

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