CAJ | 학술논문

采用凝胶渗透色谱、连续自成核-退火热分级、升温淋洗分级等研究了不同耐压等级耐热聚乙烯管材料的常规物性、相对分子质量及其分布、片晶分布、不同温度级分含量及相对分子质量等。结果表明：两种管材料的氧化诱导期（210℃）在65min以上；相对分子质量分布在5左右；高温片晶厚度大于10nm，89℃以上升温淋洗分级级分含量大于25%，可赋予管材料较高的强度。
채용응효삼투색보、련속자성핵-퇴화열분급、승온림세분급등연구료불동내압등급내열취을희관재료적상규물성、상대분자질량급기분포、편정분포、불동온도급분함량급상대분자질량등。결과표명：량충관재료적양화유도기（210℃）재65min이상；상대분자질량분포재5좌우；고온편정후도대우10nm，89℃이상승온림세분급급분함량대우25%，가부여관재료교고적강도。
Basic physical properties, relative molecular mass and its distribution, lamella distribution and frac-tions distribution at different temperatures of different pressure resistance grades of polyethylene of raised temperature resistance for pipes were studied by gel permeation chromatography (GPC), successive self-nucleation and annealing (SSA), temperature rising elution fractionation (TREF), etc. The results indicate that both kinds of pipe materials have long oxidation induction time above 65 min at 210 ℃ and narrow relative molecular mass distribution about 5. The high-temperature lamella thickness is over 10 nm and the fractions content by TREF (>89 ℃) is above 25%, which endow the pipe materials with high strength.