Shape memory polymer hybrids of SBS/dl-PLA and their shape memory effects

Zhang, Heng; Chen, Zhi; Zheng, Zheng; Zhu, Xiaomin; Wang, Haitao

doi:10.1016/j.matchemphys.2012.10.006

Cited by 27 publications

(18 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PLA (3052D), primarily poly( L -lactide) (PLLA) with 4 mol % of D -lactic acid units, an trueM¯w of 190,000, and a polydispersity index of 1.7 [29,30], was supplied by NatureWorks LLC, USA, with a melt flow rate of 14 g/10 min (210 °C, 2.16 kg) (ASTM D1238) and a specific gravity of 1.24 (ASTM D792). A linear SBS (YH-791), with 30 wt % of PS and 70 wt % of PBD and an trueM¯w of 160,000 [31], was obtained from Baling Petrochemical Co., SINOPEC Group, Yueyang, China. Distilled water was home-made in our laboratory using a stainless-steel water distiller.…”

Section: Methodsmentioning

confidence: 99%

Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements

Wang

Tao

et al. 2019

Polymers

View full text Add to dashboard Cite

A poly(styrene-ran-methyl acrylate) (S-MA) (75/25 mol/mol), synthesized by surfactant-free emulsion copolymerization, was used as a compatibilizer for polystyrene-b-polybutadiene-b-polystyrene (SBS)-toughened polylactide (PLA) blends. Upon compatibilization, the blends exhibited a refined dispersed-phase morphology, a decreased crystallinity with an increase in their amorphous interphase, improved thermal stability possibly from the thicker, stronger interfaces insusceptible to thermal energy, a convergence of the maximum decomposition-rate temperatures, enhanced magnitude of complex viscosity, dynamic storage and loss moduli, a reduced ramification degree in the high-frequency terminal region of the Han plot, and an increased semicircle radius in the Cole–Cole plot due to the prolonged chain segmental relaxation times from increases in the thickness and chain entanglement degree of the interphase. When increasing the S-MA content from 0 to 3.0 wt %, the tensile properties of the blends improved considerably until 1.0 wt %, above which they then increased insignificantly, whereas the impact strength was maximized at an optimum S-MA content of ~1.0 wt %, hypothetically due to balanced effects of the medium-size SBS particles on the stabilization of preexisting crazes and the initiation of new crazes in the PLA matrix. These observations confirm that S-MA, a random copolymer first synthesized in our laboratory, acted as an effective compatibilizer for the PLA/SBS blends.

show abstract

Section: Methodsmentioning

confidence: 99%

Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements

Wang

Tao

et al. 2019

Polymers

View full text Add to dashboard Cite

show abstract

“…The fast recovery process could find some applications, for instance in thermo-responsive sutures [27]. At strains up to 800 %, the materials were still able to recover its original shape when reheated at 60°C without any applied force, demonstrating its excellent recovery ability.…”

Section: Shape Memory Testingmentioning

confidence: 96%

“…R r described to what extent the original shape can be recovered. The percentage of shape fixing, R f , and shape recovery, R r , were calculated using the following equations [5,26,27]:…”

Section: Shape Memory Testingmentioning

confidence: 99%

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Yin

Zhang

2016

J Polym Res

View full text Add to dashboard Cite

PCL based hybrid films exhibiting heat-responsive shape memory properties had been obtained by using Heptaphenyltricycloheptasiloxane Trihydroxy Silanol (T7-OH) as a cross-linker. The crystallization behaviors of the materials were studied in detail by DSC and XRD. The thermal properties of the materials were detected through TGA. The static mechanical properties, in vitro degradation and shape memory properties were also studied systematically. There was no remarkable T7-OH crystal plane diffraction peak according to XRD which indicated that T7-OH was well dispersed in the matrix. Meanwhile, according to the TGA, thermal degradation temperatures were increased significantly when T7-OH were added. It was worth noting that the materials possessed excellent shape memory properties with R f > 97 % and R r > 97 %.

show abstract

“…Shape memory polymers (SMPs) are novel smart materials which possess the capacity to maintain temporary shapes and recover their permanent shape under an external stimulus [1], such as temperature [2,3], pH [4,5], light [6,7,8] and an electromagnetic field [9,10]. With the merits of being lightweight, structurally versatile and having large recovery ability [11], SMPs exhibit tremendous advantages over shape memory alloys (SMAs) and shape memory ceramics (SMCs) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Behavior of Natural Eucommia ulmoides Gum and Low-Density Polyethylene Blends with Two Response Temperatures

Xia

Chen

et al. 2019

Polymers

View full text Add to dashboard Cite

A series of shape memory blends of natural Eucommia ulmoides gum (EUG) and low-density polyethylene (LDPE) with a bicontinuous cross-linked structure were prepared by a physical blending method, which could be used in the field of thermal response with two different temperatures. We report the shape memory properties of these blended materials with two response temperatures for the first time. The mechanical, curing, thermal and shape memory properties of the blends were studied in this manuscript. Schematic diagrams are proposed to illustrate the dual shape memory behaviors of the EUG/LDPE blends. Our study focused on observing the relationship between the shape memory behavior and the microscopic crystalline phase states in the blends. In the blends, both the cross-linked network and the LDPE crystalline regions could act as fixed domains, while the crystalline regions of LDPE or EUG could act as the reversible domain. The shape memory properties were mainly determined by the components of the fixed and reversible domains. We focused on the shape memory behavior of blends at 60 °C and 130 °C in this manuscript. The results showed that when the peroxide dicumyl peroxide (DCP) dosage was 1.0 phr, the blends exhibited acceptable shape behavior at 60 °C (R1f = 74.8%, R1r = 63.3%). At the same time, when DCP dosage was 0.4 phr, the shape memory behavior of the blends at 130 °C was good and much better than that at 60 °C (R2f = 91.1%, R2r = 89.4%).

show abstract

Shape memory polymer hybrids of SBS/dl-PLA and their shape memory effects

Cited by 27 publications

References 18 publications

Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements

Effect of Poly(styrene-ran-methyl acrylate) Inclusion on the Compatibility of Polylactide/Polystyrene-b-Polybutadiene-b-Polystyrene Blends Characterized by Morphological, Thermal, Rheological, and Mechanical Measurements

Preparation and characterization of POSS-crosslinked PCL based hybrid materials

Shape Memory Behavior of Natural Eucommia ulmoides Gum and Low-Density Polyethylene Blends with Two Response Temperatures

Contact Info

Product

Resources

About