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对N2保护下CDP的固相缩聚进行了基础研究，得出了CDP固相缩聚的一般规律，并对实验结果进行了讨论，与常规PET固相缩聚的一些规律进行了比较，同时还比较了不同反应氛围下CDP的分子量变化情况。“,”The solid - state polycondensation (SSP) of CDP under N2 atmosphere was studied. The general rules of CDP SSP has been ob-tained. Some comparison were done between CDP and PET, as well as variety of molecular weight under the vacuum atmosphere and N2atmosphere.