A5028921561- biodegradable polymer synthesis and properties
- Polymer crystallization and properties
- Microplastics and Plastic Pollution
- Carbon dioxide utilization in catalysis
- Advanced Polymer Synthesis and Characterization
- Electrospun Nanofibers in Biomedical Applications
- Block Copolymer Self-Assembly
- Polymer Nanocomposites and Properties
- Linguistic Studies and Language Acquisition
- Additive Manufacturing and 3D Printing Technologies
- Online and Blended Learning
- Synthesis and properties of polymers
- Educational and Social Studies
- Educational Tools and Methods
- Polyoxometalates: Synthesis and Applications
- Phonetics and Phonology Research
- Silicone and Siloxane Chemistry
- Historical Linguistics and Language Studies
- Engineering Education and Technology
- Photopolymerization techniques and applications
- Synthetic Organic Chemistry Methods
University of the Basque Country
2021-2024
Polymat
2021-2024
Ikerbasque
2022
NXP (Netherlands)
2020
Stereo-defects present in stereo-regular polymers often diminish thermal and mechanical properties, hence suppressing or eliminating them is a major aspirational goal for achieving with optimal enhanced properties. Here, we accomplish the opposite by introducing controlled stereo-defects to semicrystalline biodegradable poly(3-hydroxybutyrate) (P3HB), which offers an attractive alternative isotactic polypropylene but brittle opaque. We enhance specific properties performance of P3HB...
Cyclic block copolymers (cBCP) are fundamentally intriguing materials, but their synthetic challenges that demand precision in controlling both the monomer sequence and polymer topology limit access to AB ABC architectures. Here, we show cyclic ABAB tetra-BCPs (cABAB) linear counterpart (lABAB) can be readily obtained at a speed scale from one-pot (meth)acrylic mixtures, through coupling Lewis pair polymerization's unique compounded-sequence control with its control. This approach achieves...
Usually, the nature of surface-induced nucleation in polymer blends is not easily disclosed. A novel approach for studying crystallization semicrystalline polymers proposed here. It consists detecting variations kinetics dispersed phase with changing crystalline state matrix through self-nucleation. can be used only when has a lower melting temperature than phase. As case study, behavior polyethylene droplets polypropylene was investigated. An enhancement achieved lamellar thickness...
A series of aliphatic polyethers with different chain lengths (nCH2 = 6 to 12 and 16) is studied employing differential scanning calorimetry X-rays scattering. The calorimetric structural behavior samples crystallized from the melt divided into odd–even saturation regions. In region 10), odd 7 9) show enhanced properties (e.g., higher transition temperatures) faster crystallization kinetics than even ones 6, 8, 10). crystallize in orthorhombic unit cells monoclinic cells. 11 16), increase as...
Highly linear or high-density polyethylenes (HDPEs) have an intrinsically high nucleation density compared to other polyolefins. Enhancing their by self-nucleation is therefore difficult, leading a narrow Domain (i.e., the so-called DomainII temperature where self-nuclei can be injected into material without occurrence of annealing). In this work, we report that when HDPE blended (up 50%) with immiscible matrices, such as atactic polystyrene (PS) Nylon 6, its capacity greatly increased....
Poly(3-hydroxybutyrate) (PHB) is naturally accumulated by bacteria but can also be synthesized chemically. Its processability limited, as it tends to degrade at temperatures above its melting temperature; hence, investigation into crystallization kinetics and morphology of PHB materials both natural synthetic origins great need interest get a better understanding structure–property relationship. Accordingly, this contribution reports first study the different molecular weights. These PHBs...
Polyhydroxyalkanoates are natural polyesters synthesized by microorganisms and bacteria. Due to their properties, they have been proposed as substitutes for petroleum derivatives. This work studies how the printing conditions employed in fuse filament fabrication (FFF) affect properties of poly(hydroxybutyrate-co-hydroxy hexanoate) or PHBH. Firstly, rheological results predicted printability PHBH, which was successfully realized. Unlike what usually happens FFF manufacturing several...
Poly(3-hydroxybutyrate) (P3HB), a biologically produced, biodegradable natural polyester, exhibits excellent thermal and barrier properties but suffers from mechanical brittleness, largely limiting its applications. Here we report mono-material product design strategy to toughen stereoperfect, brittle bio or synthetic P3HB by blending it with stereomicrostructurally engineered P3HB. Through tacticity ([mm] 0 100 %) molecular weight (Mn 788 kDa) tuning, high-performance materials tensile...
In the polyester family, biopolymer with greatest industrial potential could be poly(3-hydroxybutyrate) (PHB), which can produced nowadays biologically or chemically. The scarce commercial use of PHB derives from its poor mechanical properties, improved by incorporating a flexible aliphatic good performance, such as poly(ε-caprolactone) (PCL), while retaining biodegradability. This work studies structural, thermal, and morphological properties block random copolymers PCL. presence comonomer...
The crystal structure of poly(7-heptalactone) (PHL) is presented. PHL has been synthesized by a combination ring-opening polymerization η-heptalactone and reversible addition–fragmentation chain transfer using diphenyl phosphate as catalyst. noncommercial available monomer prepared oxidation cycloheptanone. determined analysis the X-ray powder diffraction profiles electron patterns single crystals calculations lattice energy. refined with Rietveld full-profile refinement. Chains in trans...
Aliphatic polyesters are widely studied due to their excellent properties and low-cost production also because, in many cases, they biodegradable and/or recyclable. Therefore, expanding the range of available aliphatic is highly desirable. This paper reports synthesis, morphology, crystallization kinetics a scarcely polyester, polyheptalactone (PHL). First, we synthesized η-heptalactone monomer by Baeyer–Villiger oxidation cycloheptanone before several polyheptalactones different molecular...
Abstract Poly(3‐hydroxybutyrate) (P3HB), a biologically produced, biodegradable natural polyester, exhibits excellent thermal and barrier properties but suffers from mechanical brittleness, largely limiting its applications. Here we report mono‐material product design strategy to toughen stereoperfect, brittle bio or synthetic P3HB by blending it with stereomicrostructurally engineered P3HB. Through tacticity ([ mm ] 0 100 %) molecular weight ( M n 788 kDa) tuning, high‐performance materials...