Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The glass transition temperature () is undoubtedly one of the most important characteristics of polymers, and investigating its dependence on their structure and composition is crucial from both fundamental and application points of view. This study deals with the unexpected relationship between and the average molecular weight between crosslinking points () in nanophase-separated polystyrene--poly(dimethylsiloxane) (PSt--PDMS) and polystyrene--poly(dimethylsiloxane)/divinylbenzene (PSt--PDMS/DVB) polymer conetworks. In order to reveal the correlation between the and , a library of PSt--PDMS and PSt--PDMS/DVB conetworks was synthesized, and their compositions and s were determined. Instead of the expected increase of with decreasing , a reverse correlation was found. Namely, the decreases with decreasing in these conetworks. Correlation analyses showed that the linearly depends on 1/, similar to the Fox-Flory relationship for homopolymers with their , that is, = -/ for the investigated conetworks, independent of the absence or presence of relatively low amounts of DVB as an additional small molecular weight crosslinker. This means that the PDMS macrocrosslinker acts like scissors by interrupting the mobility of the crosslinked PSt chains in the conetworks, and the of the PSt segments will be close to that of PSt homopolymers with the same as , as found by comparison. Consistent with previous findings with other conetworks, the presence of the of the macromolecular crosslinker in the PSt--PDMS and PSt--PDMS/DVB conetworks indicates that the scissors effect is a general phenomenon for polymer conetworks formed by crosslinking with a macromolecular crosslinker. The observed unusual versus relationship in the conetworks can be utilized in designing such novel materials with predetermined s required for targeted applications.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12197235 | PMC |
| http://dx.doi.org/10.3390/polym17121656 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Meat protein microgels assembled under various temperature-concentration conditions: Underlying its interfacial behavior.
Food Chem
September 2025
State Key Laboratory of Meat Quality Control and Cultured Meat Development; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing Agricultural University, Nanjing 210095, PR China. Electronic address:
At moderate protein concentrations (10, 20 mg/mL) and a high temperature (80 °C), meat protein (MP) self-assembled into weak gels and then intriguingly collapsed into microgels through continuous heating and annealing cooling, resulting in a sol state with exposed hydrophobic groups and disulfide bonds. The different prepared microgel groups were labeled as MP and MP, respectively. Compared with the control group (Con: 7.
View Article and Find Full Text PDFPreparation, Characterization, and Self-Assembly of P3HT-Based Janus Fibers via a Crystallization-Driven Self-Assembly Process.
ACS Macro Lett
September 2025
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
Poly(3-hexylthiophene) (P3HT)-based complex topological copolymers have attracted a great deal of attention for their unique electrical and optical properties. In this contribution, the P3HT-based Janus fibers with controlled lengths were innovatively prepared by sequential crystallization-driven self-assembly (CDSA) of poly(--butylstyrene)--polyisoprene--poly(3-hexylthiophene) (PBS--PI--P3HT) triblock copolymer, cross-linking of the interlayer PI region, and dissociation of fibers in good solvent. The comprehensive characterizations showed that the PBS/P3HT Janus fibers have nearly half the width of PBS--PI--P3HT fibers and fiber lengths close to or slightly shorter than those of PBS--PI--P3HT fibers, indicating that the Janus fibers with adjustable lengths could be prepared in a large window range.
View Article and Find Full Text PDFComparison of ferulic acid-crosslinked anthocyanins-fish gelatin-based intelligent hydrogels and films: Characterization and application.
Int J Biol Macromol
September 2025
Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition, College of Food Science and Engineering, Ningbo University, Ningbo, 315832, China. Electronic address:
Fish gelatin (FG) is a biopolymer with favorable biocompatibility, mechanical strength, and water retention, making it ideal for films, hydrogels, and bio-based applications. This study aimed to comparatively investigate the FG based intelligent films and hydrogels for monitoring shrimp freshness. Intelligent films and hydrogels were prepared using FG as a macromolecular matrix, incorporating ferulic acid (FA)-crosslinked anthocyanin (ACN) as an indicator, and enhanced with polysaccharides (κ-carrageenan (κC), xanthan glucomannan (XG), and konjac glucomannan (KGM)).
View Article and Find Full Text PDFReactive Oxygen Species-Responsive Polymeric Chloroquine Nanogel for Targeted Oral Therapy of Ulcerative Colitis.
ACS Appl Mater Interfaces
September 2025
Center for Drug Delivery and Nanomedicine, University of Nebraska Medical Center, Omaha, Nebraska 68198-5830, United States.
Targeted drug delivery remains a critical challenge in the treatment of ulcerative colitis, as the side effects of current systemic therapies often outweigh their therapeutic benefits. In this study, we developed a reactive oxygen species (ROS)-responsive nanogel system that releases polymeric chloroquine (PCQ), a macromolecular derivative of hydroxychloroquine (HCQ), for localized treatment of ulcerative colitis. The initial nanogel formulation, measuring 183 nm in size with a surface charge of +13 mV, was synthesized via RAFT polymerization using a thioketal dimethacrylate cross-linker to demonstrate ROS-triggered degradation, physicochemical stability in simulated gastrointestinal fluids, favorable biocompatibility, and preferential accumulation in inflamed colonic tissue.
View Article and Find Full Text PDFPhotochromic Hydrophobic Eutectogel with High Adhesion, Stability, and Self-Healing for Information Encryption, Underwater Wireless Communications, and Motion Monitoring.
Small
August 2025
School of Materials Science and Engineering, Tongji University, Shanghai, 201804, P. R. China.
As an outstanding flexible conductive material, eutectogels have received increasing attention due to their potential applications in fields such as flexible wearable electronics and wireless communications. However, the development of multifunctional eutectogels with stability in underwater environments is still very challenging due to the high sensitivity of most deep eutectic solvents (DES) to water. Herein, a hydrophobic eutectogel is fabricated by simple photopolymerization, the introduction of macromolecular cross-linking agents, fluorine-rich monomers and dynamic light-responsive functional ammonium molybdate tetrahydrate (Mo), as well as multiple dynamic interactions within the eutectogel, endowed it with excellent mechanical properties (160 kPa), long-term underwater repetitive adhesion (102.
View Article and Find Full Text PDF