Finely-tuned strength-toughness balance of PPR/ UHMWPE blends via shear-enhanced crystal orientation and cocrystal-locked UHMPE particles

Document Type : Original research

Authors

• Zhijie Zhao ^{1, 2, 3}
• Ping Hai ^{1, 2, 3}
• Minjuan Zhang ^{1, 2, 3}
• Yongbiao Zheng ^{1, 2, 3}
• Yuerong Chen ^{1, 2, 3}
• Cunling Long ^{1, 2, 3}
• Hongtao Zhang ^{1, 2, 3}
• Xinyi Zhang ^{1, 2, 3}

¹ Qinghai Provincial Drug inspection and Testing Institute, Xi’ning, 810016, China

² Qinghai Institute of Medical Device Supervision and Testing, Xi’ning, 810016, China

³ NMPA Key Laboratory for Quality Control of TCM（Tibetan Medicine, Xi’ning, 810016, China

Abstract

Graphical Abstract

Highlights

1. Low addition of UHMWPE is inclined to be miscible with the PP matrix.
2. Phase separation occurs at high addition of UHMWPE.

3. The co-crystal structure locks UHMWPE domains into smaller size.
4. Orientated crystal leads to balanced mechanical strength and toughness for PPR.

Keywords

• Mechanical property
• polymer blending
• phase morphology
• crystal orientation

Main Subjects

• Polyolefin blends
• Structure and property relationship