Rheological and thermoresponsive shape memory properties of polylactic acid (PLA) and styrene-butadiene-styrene (SBS) copolymer blends

Rahim, Fathin Hani Azizul; Rusli, Arjulizan

doi:10.1007/s10965-022-03296-9

Cited by 9 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design of chain entanglements at the interface in multicomponent PLA‐based blends had attracted considerable attention in recent years, and many researchers had reported that desirable compatibility was achieved between phases enhanced by interfacial entanglements [32,34,37,55,63–65] . Relative to the interchain polar force, interchain entanglements of PLA chains with heterogenous chains could enable the blends to obtain a much more strengthened interfacial compatibility.…”

Section: Physical Blending Of Pla With Linear Polymersmentioning

confidence: 99%

“…To improve the melt strength and ductility of PLA, various strategies have been developed, such as blending of PLA with linear flexible polymers, long‐chain branching of PLA, and the introduction of soft segments into PLA chains [26–31] . The commonly used methods included physical blending and reactive processing in view of plastic processing [32,33] . The common aim of these reported methods was to introduce flexible parts or long‐branched chains into PLA matrix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Role of Interchain Force and/or Chain Entanglement in the Melt Strength and Ductility of PLA‐Based Materials

Chen

Sun

et al. 2023

Chemistry An Asian Journal

View full text Add to dashboard Cite

As an eco‐friendly material, PLA was a desirable alternative to polyethylene and polypropylene films due to its biodegradability. The preferable melt strength of PLA‐based materials was a key factor in ensuring its processing using extrusion blow. This paper focuses on the influence of interchain force and/or chain entanglement on the melt strength and ductility of PLA‐based materials in recent years. In addition, the preparation of PLA‐based materials via physical blending or reactive processing was also summarized. The blending of PLA with a flexible heteropolymer, driven by the interchain force and/or chain entanglements, were characterized as a practicable method for toughening PLA‐based materials. Also, the restructuring of PLA chains, by branching based on chain entanglement, was suitable for increasing chain entanglements in PLA matrix, yielding satisfactory melt strength and ductility. This review aims to elucidate the relationship between interchain forces and/or entanglement with the melt strength and ductility of PLA‐based materials. An essential and systematic understanding of the tailoring melt strength and rheological properties of PLA by interchain forces and/or entanglement was apt to improve and perfect the processing technology of the extrusion blow, and consequently improve the tensile strength and toughness of PLA films.

show abstract

Section: Physical Blending Of Pla With Linear Polymersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Role of Interchain Force and/or Chain Entanglement in the Melt Strength and Ductility of PLA‐Based Materials

Chen

Sun

et al. 2023

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…Flexible polymers can improve the toughness of the material on the one hand, and on the other hand, may serve as crosslinking points to improve the shape memory fixation and recovery rate of the system, thus preparing PLA-based materials with good shape memory performance. [27][28][29][30][31][32][33] To the best of our knowledge, limited work has been carried out to modify PLA by reactively blending with PCL diol and HDI. In this study, PCL diol and HDI were added to PLA, where the isocyanate group in HDI can react with the hydroxyl groups in PCL diol to form a polyurethane prepolymer in situ in one step to toughen PLA.…”

Section: Introductionmentioning

confidence: 99%

“…By reactive composite of PLA and flexible components, reactive compatibilization is established at the interface. Flexible polymers can improve the toughness of the material on the one hand, and on the other hand, may serve as crosslinking points to improve the shape memory fixation and recovery rate of the system, thus preparing PLA‐based materials with good shape memory performance 27–33 …”

Section: Introductionmentioning

confidence: 99%

Sustainable polylactide/polycaprolactone based polyurethane blends fabricated via reactive compatibilization

Li,

Zhang

et al. 2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

A series of polylactide (PLA)/polycaprolactone‐based polyurethane (PCLU) blends were prepared by reactive blending of PLA with polycaprolactone diol (PCL diol) and hexamethylene diisocyanate (HDI). The reaction mechanism, compatibility, crystallization behavior and the mechanical properties of the PLA/PCLU blends were investigated. It was demonstrated that the hydroxyl group of PCL diol or PLA could react with the isocyanate (NCO) group of HDI to form PCLU or PLA‐co‐PCLU in situ, thereby improving the interfacial compatibility between PLA and PCLU phases. Phase‐separated morphology with the PCLU dispersed in the PLA matrix was observed for the PLA blends with an obscure interphase. The thermal and cold crystallization ability of PLA were retarded. PLA/PCLU blend showed higher impact strength and elongation at break compared with pure PLA. Specifically, at a 40 wt% feed ratio of PCL diol, the impact strength reached an impressive 28 kJ m−2. Notably, the shape memory performance of the blend showed a substantial improvement, achieving a remarkable shape recovery rate of 96.3% at the same 40 wt% PCL diol feed ratio. The mechanisms governing both toughening and shape memory enhancement in the blend were thoroughly elucidated.

show abstract

“…Typically, melt blending PLA with flexible rubbery polymers seems to be a promising direction toward achieving the required level of performance for HSMPs since entropic forces generated during deformation drive desired shape recovery. Many works can be found in the literature where PLA is blended with other polymers and copolymers such as Thermoplastic Polyurethane (TPU), 32 Polycaprolactone (PCL), 33 Polybutylene Succinate (PBS), 34 Poly(styrene‐(ethylene‐co‐butylene)‐styrene) (SEBS), 35 Epoxidized Natural Rubber (ENR), 36 Polymethyl Methacrylate (PMMA), 37 Polihidroxibutirato (PHB), 38 Styrene‐Butadiene‐Styrene (SBS), 39 Polyether‐Ether‐Ketone (PEEK), 40 Poly(butylene succinate‐co‐adipate) (PBSA), 41 Polyamide Elastomer (PAE), 42 Poly(ethylene glycol) (PEG), 43 Poly (butylene‐adipate‐co‐terephthalate) (PBAT), 44 and so on.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of shape memory effect in PLA/copolymers blends

Cunha

Cavalcanti

Agrawal

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this work, polylactic acid (PLA)/copolymer blends were prepared by melt blending. Ethylene‐glycidyl methacrylate (E‐GMA) and ethylene‐butyl acrylate‐maleic anhydride (EBA‐MAH) functional block copolymers were used. A ternary blend of PLA/E‐GMA/EBA‐MAH was also studied. FTIR analyses evidenced the occurrence of reactive compatibilization of E‐GMA and EBA‐MAH with PLA in the binary blends due to the reactivity of the GMA and MAH functional groups with the terminal hydroxyl and carboxyl groups of PLA. Rheological measurements evidenced the occurrence of cross‐link reactions between E‐GMA and EBA‐MAH copolymers in the ternary blend. Three distinct morphologies were observed in the blends: PLA/E‐GMA exhibited a sea‐island structure, PLA/EBA‐MAH exhibited a co‐continuous structure, and PLA/E‐GMA/EBA‐MAH exhibited a semi‐interpenetrating polymer network (SIPN) structure. The shape memory effect (SME) of PLA and PLA/copolymers blends was evaluated by three different methods: fold‐deploy, tension, and torsion. Fold‐deploy tests were conducted in a water bath, whereas the tension and torsion tests were conducted using a rheometer. All methods proved to be effective; however, some precautions must be taken to choose the most suitable test for a given purpose, which is thoroughly discussed in this work. The SME of PLA was enhanced through the incorporation of the copolymers. Blending PLA with E‐GMA, EBA‐MAH, and E‐GMA/EBA‐MAH copolymers increased its shape recovery from 32% to 84%, 79.2%, and 80%, respectively, while its shape fixity remained around 100%.

show abstract

Rheological and thermoresponsive shape memory properties of polylactic acid (PLA) and styrene-butadiene-styrene (SBS) copolymer blends

Cited by 9 publications

References 41 publications

The Role of Interchain Force and/or Chain Entanglement in the Melt Strength and Ductility of PLA‐Based Materials

The Role of Interchain Force and/or Chain Entanglement in the Melt Strength and Ductility of PLA‐Based Materials

Sustainable polylactide/polycaprolactone based polyurethane blends fabricated via reactive compatibilization

Evaluation of shape memory effect in PLA/copolymers blends

Contact Info

Product

Resources

About