Shape memory and thermo-mechanical properties of shape memory polymer/carbon fiber composites

Guo, Jianming; Wang, Zhenqing; Tong, Liyong; Lv, Hongjun; Liang, Wenyan

doi:10.1016/j.compositesa.2015.05.026

Cited by 82 publications

(44 citation statements)

References 40 publications

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“…Although our first three cycles displayed an incremental pattern in the R f and R r values, which is likely to have been owing to the training, the robust high shape fixity and shape recovery [ R f (1) = ≈95% and R r (1) > 98%] in the first cycle during the seven consecutive thermomechanical cycles (Figure a,b) indicates that pretraining is not necessary for our SMP. Moreover, circumventing pretraining reduces the residual stress and thereby aids in the preservation of strain energy for the subsequent cycles …”

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confidence: 99%

Development of a Shape‐Memory Tube to Prevent Vascular Stenosis

et al. 2019

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Figure S1 and Video S1, Supporting Information). Vessel-damage-free deployment requires the shape recovery of a graft through circumferential tube expansion by ≈40%-50% to fit the host vessel after insertion (Videos S1-S3, Supporting Information). Hence, a new class of shape memory polymer (SMP) library was synthesized through ring opening polymerization [3] with ε-caprolactone (CL) and glycidyl methacrylate (GMA) monomers (Figure 1a; Figure S2, Supporting Information). Vessel property-matching optimization necessitated a combinatorial design strategy [4] to produce tunable SMP properties through a series of development steps (Figure 1b-g). First, the idea of decreasing the shape recovery temperature, which was represented by melting temperature (T m ), to the body temperature range was validated [5] by the differential scanning calorimetry (DSC) (Figure 1b). T m decreased from the temperature of the base poly(ε-caprolactone) (PCL) to that of our SMPs because crosslinking reduced the crystallinity of PCL. This effect was more dominant compared to the increase in the tightness of the polymer chains owing to Inserting a graft into vessels with different diameters frequently causes severe damage to the host vessels. Poor flow patency is an unresolved issue in grafts, particularly those with diameters less than 6 mm, because of vessel occlusion caused by disturbed blood flow following fast clotting. Herein, successful patency in the deployment of an ≈2 mm diameter graft into a porcine vessel is reported. A new library of property-tunable shape-memory polymers that prevent vessel damage by expanding the graft diameter circumferentially upon implantation is presented. The polymers undergo seven consecutive cycles of strain energy-preserved shape programming. Moreover, the new graft tube, which features a diffuser shape, minimizes disturbed flow formation and prevents thrombosis because its surface is coated with nitric-oxide-releasing peptides. Improved patency in a porcine vessel for 18 d is demonstrated while occlusive vascular remodeling occurs. These insights will help advance vascular graft design. Biomedicine

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Development of a Shape‐Memory Tube to Prevent Vascular Stenosis

et al. 2019

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“…trans ‐1,4‐Polyisoprene (TPI) and polyethylene (PE) could be used as shape memory materials with a moderate degree of cross‐linking. The shape memory properties of TPI, PE, and their blends have been investigated in recent years . However, the disadvantage of most shape memory composites is their poor mechanical properties, and TPI and PE composites are no exception.…”

Section: Introductionmentioning

confidence: 99%

“…The shape memory properties of TPI, PE, and their blends have been investigated in recent years. [27][28][29][30][31] However, the disadvantage of most shape memory composites is their poor mechanical properties, and TPI and PE composites are no exception. Inorganic fillers are ideal candidate materials with which to improve the mechanical strength of SMPs.…”

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Shape memory behavior of carbon nanotube‐reinforced trans‐1,4‐polyisoprene and low‐density polyethylene composites

Xia

Gui-xue

2019

Polymers for Advanced Techs

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Shape memory composites of trans‐1,4‐polyisoprene (TPI) and low‐density polyethylene (LDPE) with easily achievable transition temperatures were prepared by a simple physical blending method. Carbon nanotubes (CNTs) were introduced to improve the mechanical properties of the TPI/LDPE composites. The mechanical, cure, thermal, and shape memory properties of the TPI/LDPE/CNTs composites were investigated in this study. In these composites, the cross‐linked network generated in both the TPI and LDPE portions acted as a fixed domain, while the crystalline regions of the TPI and LDPE portions acted as a domain of reversible shape memory behavior. We found that CNTs acted as not only reinforced fillers but also nucleation agents, which improved the crystalline degree of the TPI and LDPE portions of the composites. Compared with the properties at the other CNT doses, the mechanical properties of the TPI/LDPE composites when the CNT dose was 1 phr were improved significantly, showing excellent shape memory properties (Rf = 97.85%, Rr = 95.70%).

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“…During programming process, SMPs specimens were heated above transition temperature, deforming with applied force, cooling below glass transition temperature ( T g ), and unloading their applied force to fix the temporary shape. In recovery process, SMPs specimens were reheated above T g and recover to their original shape owing to the recovery force stored in specimens . As we all know, the shape memory properties were associated with the composition of shape SMPs.…”

Section: Introductionmentioning

confidence: 99%

Shape memory CTBN/epoxy resin/cyanate ester ternary resin and their carbon fiber reinforced composites

et al. 2019

J of Applied Polymer Sci

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Carboxylated‐terminated liquid acrylonitrile rubber (CTBN) and epoxy resin (JEF‐0211) were coreacted with cyanate ester (CE) to form CTBN/EP/CE ternary resin systems. Further, the ternary resin system was applied as prepreg for carbon fiber composites with vacuum bag degassing molding process. CTBN/EP/CE ternary shape memory polymer (SMP) exhibited relatively high tensile strength, Young's modulus, impact strength, and excellent shape memory properties. Compared with CTBN/EP/CE ternary SMP, CTBN/EP/CE carbon fiber composites showed much higher mechanical properties, such as their tensile strength and Young's modulus were high to 570 MPa and 36.7 GPa, respectively. Furthermore, CTBN/EP/CE carbon fiber composites exhibited good shape memory properties, their shape fixity ratio and shape recovery ratio were more than 95% after 30 times repeating shape memory tests. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48756.

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Shape memory and thermo-mechanical properties of shape memory polymer/carbon fiber composites

Cited by 82 publications

References 40 publications

Development of a Shape‐Memory Tube to Prevent Vascular Stenosis

Development of a Shape‐Memory Tube to Prevent Vascular Stenosis

Shape memory behavior of carbon nanotube‐reinforced trans‐1,4‐polyisoprene and low‐density polyethylene composites

Shape memory CTBN/epoxy resin/cyanate ester ternary resin and their carbon fiber reinforced composites

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