聚乙烯拉伸屈服应力-分子结构预测模型研究  

Prediction model of tensile yield stress-molecular structure of polyethylene

作　　者：王金刚[1] 高凌雁[1] 郭锐[1] 栾凌 Wang Jingang;Gao Lingyan;Guo Rui;Luan Ling(Research Institute of Qilu Branch Co.,SINOPEC,Zibo 255400,China)

机构地区：[1]中国石油化工股份有限公司齐鲁分公司研究院,山东淄博255400

出　　处：《合成树脂及塑料》2021年第4期7-10,共4页China Synthetic Resin and Plastics

摘　　要：通过对国内外17种采用不同工艺和催化剂生产的聚乙烯进行分析,得出支化点含量为拉伸屈服应力的主要影响因素,重均分子量和相对分子质量分布为次要影响因素。经数据转化与分析研究,应用Origin软件,采用线性拟合与多元非线性拟合相结合的方法建立了拉伸屈服应力-分子结构预测模型。准确性验证及应用验证表明,该模型准确性良好,可以用于定制开发聚乙烯新产品,指导现有产品性能提升、加工应用及质量控制。Seventeen polyethylene resins produced by different processes and catalysts at home and abroad were analyzed.The results show that the main influencing factor of tensile yield stress is the content of branch point,and followed by the weight-average molecular weight and molecular weight distribution.A tensile yield stress-molecular structure prediction model was established via Origin software combining linear fitting and multivariate nonlinear fitting as well as data transformation and analysis.The accuracy and application of the model were verified.It can be used to customize and develop new polyethylene products,guide the performance improvement,processing application and quality control of existing products.

关 键 词：聚乙烯 拉伸屈服应力 支化点 重均分子量 相对分子质量分布 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]