学术论文

      湿固化聚氨酯密封胶的合成与表征

      Synthesis and characterization of moisture curing polyurethane sealant

      摘要:
      首先利用聚醚多元醇、二苯基甲烷二异氰酸酯( MDI )等为原料制备端异氰酸酯聚氨酯预聚体( NCO PU),然后加入邻苯二甲酸丁苄酯(BBP)、炭黑、CaO等原料制备湿固化聚氨酯密封胶(MSPUS)。研究不同异氰酸根与羟基的物质的量比( R)对NCO PU红外谱图的影响,以及研究BBP用量和R值变化对MSPUS性能的影响。结果表明:红外谱图显示通过使用聚醚多元醇、MDI 等为原料成功制得了 NCO PU;当 R=2?22、m ( BBP )/m( NCO PU)=0?7时,MSPUS的性能最佳,拉伸强度达到7?27 MPa,断裂伸长率达到334%,剪切强度达到3?74 MPa,耐水性能良好,达到了汽车、建筑等行业的使用要求。
      Abstract:
      A series of moisture curing polyurethane adhesives(MSPUS) were synthesized by two steps. First, polyurethane prepolymer ( NCO?PU ) was prepared by polyether polyol and diphenyl methane diisocyanate( MDI) as raw materials. Then the MSPUS was prepared by butyl benzyl phthalate ( BBP ) , carbon black and calcium oxide,etc.The influence of different ratios of isocyanato and hydroxyl group(R) on Fourier transform infrared spectrometry ( FT?IR) of the NCO?PU was investigated in detail,and the influence of different R values and BBP content on the MSPUS properties was also studied.Results of FT?IR showed that MSPUS was fabricated by polyether polyol and MDI. In addition,when the R value was 2?22,and the m(BBP)/m(NCO?PU) was 0?7,MSPUS had excellent mechanical properties with tensile strength of 7?27 MPa, elongation at break of 334% and shear strength of 3?74 MPa, and good water resistance fully meeting the requirements of the automotive,construction and other industries.
      作者: 伍石 [1] 项尚林 [1] 曹培培 [1] 王博 [2] 费爱燕 [2]
      Author: WU Shi [1] XIANG Shanglin [1] CAO Peipei [1] WANG Bo [2] FEI Aiyan [2]
      作者单位: 南京工业大学 材料科学与工程学院,江苏 南京,210009 南京艾布纳密封技术有限公司,江苏 南京,210005
      年,卷(期): 2017, 39(1)
      分类号: TQ433.4+3
      在线出版日期: 2017年3月7日
      基金项目: 江苏高校优势学科建设工程