Thermal, Morphological, Mechanical and Aging Properties of Polylactide Blends with Poly(ether urethane) Based on Chain-extension Reaction of Poly(ethylene glycol) Using Diisocyanate
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Thermal, Morphological, Mechanical and Aging Properties of Polylactide Blends with Poly(ether urethane) Based on Chain-extension Reaction of Poly(ethylene glycol) Using Diisocyanate
Chinese Journal of Polymer ScienceVol. 34, Issue 9, Pages: 1070-1078(2016)
Affiliations:
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Feng Li-dong, Xiang Sheng, Sun Bin, et al. Thermal, Morphological, Mechanical and Aging Properties of Polylactide Blends with Poly(ether urethane) Based on Chain-extension Reaction of Poly(ethylene glycol) Using Diisocyanate[J]. Chinese Journal of Polymer Science, 2016, 34(9): 1070-1078.
DOI:
Feng Li-dong, Xiang Sheng, Sun Bin, et al. Thermal, Morphological, Mechanical and Aging Properties of Polylactide Blends with Poly(ether urethane) Based on Chain-extension Reaction of Poly(ethylene glycol) Using Diisocyanate[J]. Chinese Journal of Polymer Science, 2016, 34(9): 1070-1078.DOI: 10.1007/s10118-016-1822-4.
Thermal, Morphological, Mechanical and Aging Properties of Polylactide Blends with Poly(ether urethane) Based on Chain-extension Reaction of Poly(ethylene glycol) Using Diisocyanate
were prepared through chain-extension reaction of poly(ethylene glycol) (PEG-1500) using diisocyanate as a chain extender
including isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI). These PEUs were used to toughen polylactide (PLA) by physical and reactive blending. Thermal
morphological
mechanical and aging properties of the blends were investigated in detail. These PEUs were partially compatible with PLA. The elongation at break of the reactive blends in the presence of triphenyl phosphate (TPP) for PLA with PEUH15 or PEUI15 was much higher than that of the physical blends. The aging test was carried out at-20℃ for 50h in order to accelerate the crystallization of PEUs. The PEUs in the PLA/PEU blends produced crystallization and formed new phase separation with PLA
resulting in the declined toughness of blends. Fortunately
under the aging condition
although PEUH15 in blends could also form crystallization
the reactive blend of PLA/PEUH15/TPP(80/20/2) had higher toughness than the other blends. The elongation at break of PLA/PEUH15/TPP(80/20/2) dropped to 287% for the aging blend from 350% for the original blend. The tensile strength and modulus of PLA/PEUH15/TPP blend did not change obviously because of the crystallization of PEUH15.
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