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xiapeng08
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hangyu138(½ð±Ò+1,VIP+0):ËäÈ»²»ÊÇÌ«ºÃ£¬Ó¦ÓÃÁËÍøÂç·Ò룬¹þ¹þ£¬¸ÐлÄãµÄ²ÎÓë 5-8 21:08
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hangyu138(½ð±Ò+1,VIP+0):ËäÈ»²»ÊÇÌ«ºÃ£¬Ó¦ÓÃÁËÍøÂç·Ò룬¹þ¹þ£¬¸ÐлÄãµÄ²ÎÓë 5-8 21:08
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Polyvinyl acetate test study of the polymerization degree Using gel permeation chromatography (GPC) method of polyvinyl acetate (PVAc) based on the degree of polymerization, the PVAc dilute solution as a Newtonian fluid approximation, through the rotating viscometer of the intrinsic viscosity determination of PVAc [] value . Of lnP-ln [] / C for linear fit, derived from the determination of the degree of polymerization of PVAc empirical formula for lnP = 4.7287 ln [] / C + 6.1796. Ubisch viscometer method used to verify the empirical formula, the formula has a certain reliability. Laboratory under different conditions and degree of polymerization of PVAc different accuracy, choose a different test methods |
2Â¥2009-05-07 23:31:50
hangyu138
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3Â¥2009-05-08 21:10:13














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