反应性接枝共聚物增容PET/mLLDPE合金的制备及其结构与性能研究

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中图分类号：TQ327.9 文献标志码：A 文章编号：1673-3851（2025）07-0451-10

引用格式：，等．反应性接枝共聚物增容PET/mLLDPE合金的制备及其结构与性能研究J].学报（自然科学），2025，53（4）：451-460.

Abstract：To address the compatibility issues between polyethylene terephthalate （PET） and metallocene linear low-density polyethylene （mLLDPE） and to enhance the overall performance of PET/ mLLDPE aloys，PET/mLLDPE alloys were prepared by melt blending with polyolefin elastomer-grafted methacrylic acid glycidyl ester （POE- g GMA） and elastomeric hydrogenated styrene-butadiene block copolymer-grafted methacrylic acid glycidyl ester （SEBS- g GMA） as compatilizers. The impact strength and tensile properties of the PET/mLLDPE alloys were tested using a simply surpported beam impact testing machine and an electronic universal testing machine. The changes in microstructure， carboxyl content at the PET end，thermal properties，and dynamic rheological properties of the PET/mLLDPE alloys before and after compatibilization were characterized using scanning electron microscopy，automatic potentiometric titration，differential scanning calorimetry，and rotational rheometry. The results showed that the PET/mLLDPE/POE- g GMA alloys exhibited superior impact resistance， while the PET/ mLLDPE/SEBS g GMA alloys showed better tensile strength. Both POE- g -GMA and SEBS g -GMA could improve the compatibilityof the PET/mLLDPE alloys，with the former being more effective in refining the size of the dispersed phase mLLDPE. After compatibilization，the storage modulus，loss modulus，and complex viscosity of the PET/mLLDPE alloys all increased， with POE- g -GMA and SEBS- g -GMA contributing significantly to the melt viscosity of the PET/mLLDPE system. These findings provide theoretical reference for the preparation of PET/mLLDPE plastic flooring.

Key words： PET；mLLDPE； reactive compatibilizer; alloy； melt blending； rheological propertie：

0 引言

目前，塑胶地板行业主要以聚氯乙烯（PVC）板材为主，但PVC地板环保性较差，燃烧时会释放有毒物质，如氯化氢（HCD等，对人体健康和环境造成危害[1]。（剩余14397字）