Preparation and properties of poly(epoxidized palm oil)/poly(lactic acid)blends via dynamic vulcanization

WU Yuchao; LI Chao; CHEN Tingting; LIU Wendi; QIU Renhui; QIU Jianhui

doi:10.13801/j.cnki.fhclxb.20210916.003

Volume 39 Issue 6

Jun. 2022

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WU Yuchao, LI Chao, CHEN Tingting, et al. Preparation and properties of poly(epoxidized palm oil)/poly(lactic acid)blends via dynamic vulcanization[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2668-2678. doi: 10.13801/j.cnki.fhclxb.20210916.003

Citation:

WU Yuchao, LI Chao, CHEN Tingting, et al. Preparation and properties of poly(epoxidized palm oil)/poly(lactic acid)blends via dynamic vulcanization[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2668-2678. doi: 10.13801/j.cnki.fhclxb.20210916.003

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Preparation and properties of poly(epoxidized palm oil)/poly(lactic acid)blends via dynamic vulcanization

doi: 10.13801/j.cnki.fhclxb.20210916.003

WU Yuchao^1
,,
LI Chao¹,
CHEN Tingting¹,
LIU Wendi^{1
,
,},
QIU Renhui^{1, 2
,
,},
QIU Jianhui³

1.
College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
2.
College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
3.
Qingdao Arc Polymer High-Technology CO. LTD., Qingdao 266000, China

Received Date: 2021-05-24
Accepted Date: 2021-08-29
Rev Recd Date: 2021-08-11

Available Online: 2021-09-16

Publish Date: 2022-06-01

Abstract

Abstract

Poly(lactic acid) (PLA) has the advantages of high mechanical properties, non-toxicity, renewablility, biodegradability and biocompatability. PLA has become one of the most widely used biobased plastics. However, PLA also has the disadvantages of high cost, high brittleness and low ductility, which hinders its further application in some fields. Thus, a series of bio-based poly(epoxidized palm oil) (PEPO)/PLA blends were prepared by twin-screw extrusion and injection molding techniques. The crystallization behavior, rheological properties, mechanical properties, thermal stability and micro-morphology of the blends were studied. The dynamic vulcanization mechanism of PEPO and PLA blends as well as the toughening mechanism of PEPO rubber phase in PLA were investigated. The results show that during the melt-blending of epoxidized palm oil (EPO) and PLA, EPO can self-polymerize with the help of the cationic initiator, thus forming PEPO rubber phase in PLA matrix. The formation of two-phase structure endows the blends plastic deformation under stress, leading to significant toughening efficiency on PLA. With an addition of 20wt% PEPO, the elongation at break and tensile toughness of the blend increase from 10% and 4.7 MJ/m³ (pure PLA) to 100% and 30.4 MJ/m³, respectively; but the tensile strength, tensile modulus, storage modulus and glass transition temperature of the blends decrease.
- epoxidized palm oil,
- poly(lactic acid),
- dynamic vulcanization,
- bio-based blends,
- toughening
Long Abstrsct
Innovation Points

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References(30)

References

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