聚偏氯乙烯乳液最低成膜温度对涂层阻隔性能的影响

通过对连续乳液聚合的偏氯乙烯-丙烯酸甲酯（VDC—MA）共聚乳液最低成膜温度（MFFT）的测量和涂覆膜阻隔性能的测试，研究了VDC含量和PVDC胶乳的存放时间对乳液MFFT的影响。结果表明，当单体中w（VDC）〉92％时。MFFT剧增，阻隔性能急剧下降；当w（VDC）〈92％时，MFFT随VDC的质量分数上升而缓慢下降，但表观质量下降；当w（VDC）约为92％时，MFFT最低，涂层阻隔性能最佳。

Influences of Minimum Film-forming Temperature of Polyvinylidene Chloride Emulsion on the Barrier Properties of Coating

Through measurment of the minimum film-forming temperature (MFFT) of the vinylidene chloride-methacrylate (VDC-MA) copolymer emulsion and test of the barrier property of the coating, influence of VDC content and resting period of PVDC latex on MFFT emulsion is studied. Results show that in a monomer, if w(VDC)>92%, MFFT raises sharply and the barrier property declines rapidly. If w(VDC)<92%, MFFT and its apparent mass declines slowly as VDC content rises,. And if w(VDC) is about 92%, MFFT will reach the minimum value, and thus the barrier property of the coating will be the best.