Synthesis of an alkyl chain modified hyperbranched polyester plasticizer and its application in HDPE
The current demand for polyolefins is increasing dramatically in order to meet the various needs of various products.To do this,polyolefins need to demonstrate high processability and meet specific target criteria.Although certain plasticizers are often used to enhance these properties,small molecule plasticizers often result in undesirable outcomes.To solve this problem,we combined high-density polyethylene(HDPE)with n-butanol,tri-methylolpropane,2-carboxyethylphenylphosphonic acid,and p-toluene sulfonic acid to generate FR-C4,an alkyl chain modified hyperbranched polyester plasticizer.We used a rotary rheometer,DSC,XRD,and a uni-versal testing machine to investigate the mechanical,crystallization,and rheological properties of HDPE in order to assess the impact on the material attributes and processing process.The optimal induced crystallization effect was found to occur at an extra mass fraction of 1%FR-C4.At 300 rad/s,there was a 19.7%decrease in complicated viscosity,a 12.7%improvement in tensile strength,and a 24.36%increase in crystallinity as compared to pure HDPE samples.This implies that HDPE is easier to deal with because its processing viscosity is adjusted while its tensile strength is raised.As this simple production method does not need the purification of nonlinear hy-perbranched molecules,it provides a theoretical foundation for the exploration and synthesis of high-value,easily-processable polyolefin materials.
NETL
NSTL
万方数据
