Shape Memory Performance of Thermoplastic Polyvinylidene Fluoride/Acrylic Copolymer Blends Physically Cross-Linked by Tiny Crystals

2012 ◽  
Vol 4 (9) ◽  
pp. 4825-4831 ◽  
Author(s):  
Jichun You ◽  
Hui Fu ◽  
Wenyong Dong ◽  
Liping Zhao ◽  
Xiaojun Cao ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polyvinylidene Fluoride ◽  
Memory Performance ◽  
Acrylic Copolymer ◽  
Copolymer Blends

Effect of Carbon Nanotubes on the Shape Memory Performance of Poly(vinylidene fluoride)/Acrylic Blends

2013 ◽  
Vol 30 (2) ◽  
pp. 134
Author(s):  
Hui FU ◽  
Jishan QIU ◽  
Ning CHONG ◽  
Yaqing WANG ◽  
Yuanyuan TIAN ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Shape Memory ◽  
Vinylidene Fluoride ◽  
Memory Performance ◽  
Poly Vinylidene Fluoride

scholarly journals Bio-Based Epoxy Shape-Memory Thermosets from Triglycidyl Phloroglucinol

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 542 ◽  
Author(s):  
David Santiago ◽  
Dailyn Guzmán ◽  
Francesc Ferrando ◽  
Àngels Serra ◽  
Silvia De la Flor
Keyword(s):  
Shape Memory ◽  
Shape Recovery ◽  
Memory Performance ◽  
Crosslinking Agent ◽  
Shape Memory Polymers ◽  
Crosslinking Density ◽  
Mechanical Analysis ◽  
Diglycidyl Ether ◽  
Partial Substitution ◽  
Scanning Calorimetry

A series of bio-based epoxy shape-memory thermosetting polymers were synthesized starting from a triglycidyl phloroglucinol (3EPOPh) and trimethylolpropane triglycidyl ether (TPTE) as epoxy monomers and a polyetheramine (JEF) as crosslinking agent. The evolution of the curing process was studied by differential scanning calorimetry (DSC) and the materials obtained were characterized by means of DSC, thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), stress-strain tests, and microindentation. Shape-memory properties were evaluated under free and totally constrained conditions. All results were compared with an industrial epoxy thermoset prepared from standard diglycidyl ether of Bisphenol A (DGEBA). Results revealed that materials prepared from 3EPOPh were more reactive and showed a tighter network with higher crosslinking density and glass transition temperatures than the prepared from DGEBA. The partial substitution of 3EPOPh by TPTE as epoxy comonomer caused an increase in the molecular mobility of the materials but without worsening the thermal stability. The shape-memory polymers (SMPs) prepared from 3EPOPh showed good mechanical properties as well as an excellent shape-memory performance. They showed almost complete shape-recovery and shape-fixation, fast shape-recovery rates, and recovery stress up to 7 MPa. The results obtained in this study allow us to conclude that the triglycidyl phloroglucinol derivative of eugenol is a safe and environmentally friendly alternative to DGEBA for preparing thermosetting shape-memory polymers.

Effect of Molding Temperature on Shape Memory Performance of SMPC

2020 ◽  
Vol 209 (1) ◽  
pp. 30-39
Author(s):  
Yuqin Ma ◽  
Jie Wang ◽  
Shuangshuang Li ◽  
Juan Ma ◽  
Yatao Zhao ◽  
...  
Keyword(s):  
Shape Memory ◽  
Memory Performance ◽  
Molding Temperature

Deformation rate-, hold time-, and cycle-dependent shape-memory performance of Veriflex-E resin

2011 ◽  
Vol 17 (1) ◽  
pp. 39-52 ◽  
Author(s):  
Amber J. W. McClung ◽  
Gyaneshwar P. Tandon ◽  
Jeffery W. Baur
Keyword(s):  
Shape Memory ◽  
Deformation Rate ◽  
Memory Performance ◽  
Hold Time ◽  
Cycle Dependent

Morphology, Mechanical and Thermal Properties of the Blends of Poly(Trimethylene Terephthalate)/Acrylonitrile-Styrene-Acrylic Copolymer

2014 ◽  
Vol 665 ◽  
pp. 348-351
Author(s):  
Shu Fang Lv ◽  
Shi Jie Niu ◽  
Ying Bin Liu ◽  
Ming Tao Run
Keyword(s):  
Thermal Aging ◽  
Testing Machine ◽  
Color Difference ◽  
Good Effect ◽  
Mechanical And Thermal Properties ◽  
Acrylic Copolymer ◽  
Copolymer Blends ◽  
Trimethylene Terephthalate ◽  
Universal Material Testing Machine ◽  
Material Testing Machine

Poly (trimethylene terephthalate)/acrylonitrile-styrene-acrylic copolymer blends were prepared and their morphology, thermal aging and mechanical properties were investigated by using the polarized optical microscopy, universal material testing machine and color-difference meter, repectively. The results suggest that ASA and PTT are partially miscible in the blends, and when TPEE content is 50%, a bi-continuous phases form in the blend. The PTT’s spherulites in the blends become smaller and even microcrystallites with increasing ASA content. ASA component has good effect on toughen PTT by increasing blends’ impact strength but depresses the tensile strength of the blends. ASA has no influence on the thermal aging properties of PTT, and PTT/ASA blend has better thermal aging resistance than that of PTT/ABS blend.

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