CAJ | 학술논문

采用凝胶渗透色谱、核磁共振碳谱、差示扫描量热法等分析了牌号分别为4731B，SP980，DX800的进口管材专用耐热聚乙烯（PE-RT）的性能及分子结构、相对分子质量及其分布、共聚单体种类及含量、结晶性能等。结果表明：3个牌号的PE-RT均为中、高密度聚乙烯产品（密度为0.935~0.947g/cm3），其中，4731B为乙烯与1-丁烯的共聚物，共聚单体含量低于SP980和DX800，相对分子质量分布较宽，结晶度为63%，晶片厚度为39.27nm，晶粒尺寸较大，说明其具有较好的结晶性能。
채용응효삼투색보、핵자공진탄보、차시소묘량열법등분석료패호분별위4731B，SP980，DX800적진구관재전용내열취을희（PE-RT）적성능급분자결구、상대분자질량급기분포、공취단체충류급함량、결정성능등。결과표명：3개패호적PE-RT균위중、고밀도취을희산품（밀도위0.935~0.947g/cm3），기중，4731B위을희여1-정희적공취물，공취단체함량저우SP980화DX800，상대분자질량분포교관，결정도위63%，정편후도위39.27nm，정립척촌교대，설명기구유교호적결정성능。
The properties and molecular structure, relative molecular mass and its distribution, type and content of comonomers and crystallization properties of imported raised temperature resistance polyethylene (PE-RT) including 4731B, SP980, DX800 for pipes were analyzed by gel permeation chromatography (GPC), carbon nuclear magnetic resonance (13C-NMR), differential scanning calorimetry (DSC), etc. The results show that three types of PE-RT are medium or high density polyethylene products whose density is 0.935-0.947 g/cm3. 4731B is an ethylene and 1-butene copolymer, which has content of copolymerization monomer less than those of SP980 and DX800, wider relative molecular mass distribution, crystallinity of 63%, wafer thickness of 39.27 nm and larger grain size, indicating that the crystallization behavior of the resin is good.