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[ Last edited by aiyuanzh on 2009-12-20 at 10:41 ]

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Standard Test Method of amine value and primary judgement of Spraying pure Polyurea used for Beijing-Shanghai high-speed railway

In this paper, by comparing the different standards and test methods,a standard JIS K 7237-1995 was adopted to determine the amine values of amino-component in polyurea raw materials, polyurea, polyurethane and polyurethane (urea) respectively,and by compare determined amine values of polyurea and polyurethane(urea) used on high-speed railway,correlate the NCO value of component A to amine values of component B to determine the materials used in high-speed railway is pure polyurea or polyurethane(urea).

Keywords :polyurea;amine values; Beijing-Shanghai high-speed railway

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1£¬°ÑAÓëB¹ØÁª£¬ÊÇcorrelate A to B,»¹ÊÇcorrelate A with B?
2,´Ó¶øÅж¨¸Ã¸ßÌúÓòÄÁÏÊÇ(´¿)¾Ûë廹ÊǾ۰±õ¥(ëå)¡£·­Òë³Édetermine the materials used in high-speed railway is pure polyurea or polyurethane(urea).ÊÇ·ñÉÙÁËif?
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[ Last edited by aiyuanzh on 2009-12-20 at 12:00 ]
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1. correlate A to B
2.determine whether the materials  used in high-speed railway should  be pure polyurea or polyurethane(urea).
3Â¥2009-12-20 12:05:12
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