Stereocomplex poly (lactic acid) vascular stents by 3D ‐printing with long chain branching structures: Toward desirable crystallization properties and mechanical performance

2020 ◽  
Vol 32 (1) ◽  
pp. 97-110
Author(s):  
Jiafeng Li ◽  
Wuyou Ye ◽  
Zhongyong Fan ◽  
Zhiqian Lu
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
Mechanical Performance ◽  
Poly Lactic Acid ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Vascular Stents ◽  
Branching Structures ◽  
Crystallization Properties ◽  
Long Chain

Crystallization and biocompatibility enhancement of 3D-printed poly(l-lactide) vascular stents with long chain branching structures

CrystEngComm ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 728-739 ◽  
Author(s):  
Li Jiafeng ◽  
Zhang Qin ◽  
Fan Tiantang ◽  
Gong Li ◽  
Ye Wuyou ◽  
...  
Keyword(s):  
3D Printing ◽  
Pyromellitic Dianhydride ◽  
Reactive Processing ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Vascular Stents ◽  
Branching Structures ◽  
3D Printed ◽  
Long Chain

The long chain branching poly(L-lactide)s were prepared by reactive processing of linear PLA using pyromellitic dianhydride and polyfunctional epoxy ether as the branching agent and their vascular stents were fabricated via 3D-printing.

scholarly journals Star vs long chain branching of poly(lactic acid) with multifunctional aziridine

2017 ◽  
Vol 61 (4) ◽  
pp. 785-796 ◽  
Author(s):  
Liangliang Gu ◽  
Yuewen Xu ◽  
Grant W. Fahnhorst ◽  
Christopher W. Macosko
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain

Improving Mechanical Properties and Biocompatibilities by Highly Oriented Long Chain Branching Poly(lactic acid) with Bionic Surface Structures

2020 ◽  
Vol 12 (12) ◽  
pp. 14365-14375 ◽  
Author(s):  
Jiafeng Li ◽  
Qian Chen ◽  
Qin Zhang ◽  
Tiantang Fan ◽  
Li Gong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Surface Structures ◽  
Poly Lactic Acid ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Bionic Surface ◽  
Long Chain

scholarly journals Structure and Property of Microinjection Molded Poly(lactic acid) with High Degree of Long Chain Branching

2018 ◽  
Vol 57 (33) ◽  
pp. 11312-11322 ◽  
Author(s):  
Zhong-Guo Zhao ◽  
Qi Yang ◽  
Phil Coates ◽  
Ben Whiteside ◽  
Adrian Kelly ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Chain Branching ◽  
Long Chain Branching ◽  
Structure And Property ◽  
High Degree ◽  
Long Chain

Effect of Polyethylene Glycol in Nanocellulose/PLA Composites

2019 ◽  
Vol 821 ◽  
pp. 89-95
Author(s):  
Wanasorn Somphol ◽  
Thipjak Na Lampang ◽  
Paweena Prapainainar ◽  
Pongdhorn Sae-Oui ◽  
Surapich Loykulnant ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Polyethylene Glycol ◽  
Aspect Ratio ◽  
Mechanical Performance ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Solvent Casting ◽  
Casting Method ◽  
Mediated Oxidation

Poly (lactic acid) or PLA was reinforced by nanocellulose and polyethylene glycol (PEG), which were introduced into PLA matrix from 0 to 3 wt.% to enhance compatibility and strength of the PLA. The nanocellulose was prepared by TEMPO-mediated oxidation from microcrystalline cellulose (MCC) powder and characterized by TEM, AFM, and XRD to reveal rod-like shaped nanocellulose with nanosized dimensions, high aspect ratio and high crystallinity. Films of nanocellulose/PEG/PLA nanocomposites were prepared by solvent casting method to evaluate the mechanical performance. It was found that the addition of PEG in nanocellulose-containing PLA films resulted in an increase in tensile modulus with only 1 wt% of PEG, where higher PEG concentrations negatively impacted the tensile strength. Furthermore, the tensile strength and modulus of nanocellulose/PEG/PLA nanocomposites were higher than the PLA/PEG composites due to the existence of nanocellulose chains. Visual traces of crazing were detailed to describe the deformation mechanism.

Novel mechanism for the formation of long-chain branching in polyethylene

1998 ◽  
Vol 36 (16) ◽  
pp. 2889-2898 ◽  
Author(s):  
Mark K. Reinking ◽  
Gene Orf ◽  
Douglas McFaddin
Keyword(s):  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain

Characterization of long chain branching: Dilution rheology of industrial polyethylenes

2002 ◽  
Vol 46 (2) ◽  
pp. 401-426 ◽  
Author(s):  
B. J. Crosby ◽  
M. Mangnus ◽  
W. de Groot ◽  
R. Daniels ◽  
T. C. B. McLeish
Keyword(s):  
Chain Branching ◽  
Long Chain Branching ◽  
Long Chain
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