Modification of Poly(L-lactide) via a Pectinate Polymethylphenylsilane-co-poly(ε-caprolactone)
- Changchun University of Technology, School of Chemical Engineering (China)
To solve the problem of the hard and brittle mechanical properties of poly(L-lactide) (PLLA), a novel pectinate polymethylphenylsilane-co-poly(ε-caprolactone) (PCL-PMPS-PCL) has been designed to modify PLLA via the hydrolysis polycondensnsation of methylphenyldimethoxysilane and ring-opening polymerization of ε-caprolactone. The triblock copolymer is characterized with {sup 1}HNMR and GPC. It is harmonized with PLLA in chloroform to make smooth blending film. Incorporation of PCL-PMPS-PCL lowers T{sub g} of PLLA, enhances the macromolecular mobility, and facilitates PLLA to form defective crystals. Compared to the brittle PLLA, the cross section of blends is rough and uneven. With the blending amount of PCL-PMPS-PCL going up, the tensile strength curve has a downward glacis, while the elongation at a break climbs upward, and reaches 25% at 10 wt%, exhibiting that the typical characteristics of ductile material. At the same time, the tensile strength for 10 wt% PCL-PMPS-PCL/PLLA reserve about 60 MPa, so PCL-PMPS-PCL can serve as a candidate of plasticizing PLLA.
- OSTI ID:
- 22977100
- Journal Information:
- Journal of Polymers and the Environment, Vol. 27, Issue 7; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1566-2543
- Country of Publication:
- United States
- Language:
- English
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