The results showed that both methods of air blowing and thermal polycondensation in the presence of nitrogen raised the asphalt softening points, and increased coke yields and heptane insolubles.
结果表明，空气氧化和氮气热缩聚可提高石油沥青的软化点、焦产率和正庚烷不溶物含量。
Some important characteristics of polymers include their size (or molecular weight), softening and melting points, crystallinity, and structure.
聚合材料具有一些重要特性，包括尺寸(或分子量)、软化及熔化点、结晶度和结构。
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