Polymer最新文献

{"title":"Dual-functional ionic liquid-modified PBAT-based biodegradable spherical adsorbent for high-efficiency treatment of dye wastewater","authors":"Ying Xue ,&nbsp;Yang Yu ,&nbsp;Yue Wu ,&nbsp;Xiaonan Hao ,&nbsp;Qing Liu ,&nbsp;Shulin Sun","doi":"10.1016/j.polymer.2026.129629","DOIUrl":"10.1016/j.polymer.2026.129629","url":null,"abstract":"<div><div>This study successfully prepared a porous spherical PBAT-g-IL/MMT composite adsorbent (PIMMT) for treating toxic, refractory dye wastewater through a one-step melt blending process combined with non-solvent-induced phase separation. Ionic liquids perform a dual function in this process. ILs enhance PBAT hydrophilicity through radical grafting and form intercalation structures with MMT via ion exchange, providing rapid transport pathways for pollutant molecules. This research aims to develop a biodegradable adsorbent material that combines highly efficient adsorption performance, good hydrophilicity and structural tunability. The effects of initial dye concentration, pH, temperature, contact time, and adsorbent dosage were systematically investigated. Under optimal conditions, the best sample PIMMT8 demonstrated high removal efficiency for cationic dyes methylene blue (MeB) and auramine O (AO), achieving maximum adsorption capacities (Q_max) of 145.85 mg g⁻¹ and 191.07 mg g⁻¹ respectively. Adsorption kinetics conformed to the pseudo-second-order model (R² &gt; 0.99), while isotherm data better aligned with the Freundlich model (R² &gt; 0.99), indicating multi-layer adsorption. The adsorbent demonstrated excellent reusability, maintaining removal efficiencies above 85 % for both MeB and AO after six adsorption-desorption cycles. Furthermore, the study innovatively employed a combined alcohol-alkali hydrolysis process to achieve resource recovery of the adsorbent, successfully recovering monomers such as terephthalic acid and adipic acid. This research not only fills a gap in the study of PBAT/MMT composites for dye adsorption but also provides novel insights for designing wastewater treatment materials that combine high adsorption efficiency, environmental friendliness, and resource recycling properties.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129629"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146005614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monitoring bulk acrylate-methacrylate photopolymerization reaction kinetics using in situ NMR","authors":"Luis L. Jessen ,&nbsp;Naomi Elmer ,&nbsp;George Crull ,&nbsp;Kameron R. Hansen ,&nbsp;C. Allan Guymon","doi":"10.1016/j.polymer.2026.129645","DOIUrl":"10.1016/j.polymer.2026.129645","url":null,"abstract":"<div><div>Herein, we use an in situ NMR technique to monitor both solvated and solvent-free photopolymerization reactions benefitting from the rich chemical information and high spectral resolution inherent to NMR. By placing an LED-coupled fiber optic and locking solvent within a concentric capillary situated inside the NMR tube, the photoreaction remains isolated from the solvent, allowing for the monitoring of bulk polymerizations. To optimize acquisition parameters, the relationship between nuclear relaxation and resin viscosity was investigated as a function of monomer conversion. The utility of this technique was explored by monitoring monomer conversion in photocurable hexyl acrylate, revealing remarkable reproducibility and agreement with kinetic theory. Additionally, double bond conversion in a photopolymer hydrogel was measured to illustrate the effect of monomer loading on reaction rate. Lastly, the high resolution of in situ NMR was employed to independently monitor the disappearance of acrylate and methacrylate double bonds in copolymerization reactions, directly demonstrating the preferential consumption of methacrylate over acrylate reactive groups.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129645"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146033795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of iPP on the crystallization kinetics of PB-1: Transition from promotion to inhibition with increasing isothermal crystallization temperature","authors":"Yidu Zhang ,&nbsp;Chenyang Dong ,&nbsp;Yingchao Wang ,&nbsp;Maoqing Yuan ,&nbsp;Hailong Niu ,&nbsp;Qian Li ,&nbsp;Chunguang Shao ,&nbsp;Zhen Wang ,&nbsp;Yanping Liu","doi":"10.1016/j.polymer.2026.129624","DOIUrl":"10.1016/j.polymer.2026.129624","url":null,"abstract":"<div><div>The isothermal crystallization behavior of polybutene-1 (PB-1) and its blends with isotactic polypropylene (iPP) was investigated using differential scanning calorimetry (DSC). The experiments were carried out within the temperature range from 91 °C to 101 °C. At lower crystallization temperatures, iPP phase was found to enhance the crystallization kinetics of PB-1 through heterogeneous nucleation. As the crystallization temperature increased, the effect of iPP phase on the crystallization rate of PB-1 shifted from promotion to inhibition, with an inversion point at 97 °C. This inhibitory effect was further confirmed by in-situ wide-angle X-ray diffraction (WAXD) measurements, without any detectable changes in the crystalline structure of PB-1. Complementary in-situ crystallization studies performed with a polarized optical microscope (POM) revealed a distinct morphological transition in PB-1 crystals at a higher temperature (105 °C), characterized by an evolution from classical spherulite to hedrite, which is considered to be related with variations in crystallization kinetics. The crystal growth mode depends on the gradient of mass transport, determining the crystal morphology further. Elevated temperature enhances molecular mobility, thereby promoting the growth of single crystals with increased lamellar width, manifested as hedrite. However, the presence of iPP crystals might impede crystal growth of hedrite by changing the gradient of mass transport, ultimately reducing the crystallization kinetics of PB-1. The inhibitory effect can be counteracted by lowering the crystallization temperature or applying a flow field.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129624"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interphase anchoring mechanism for enhanced environmental stress cracking resistance in recycled high-density polyethylene","authors":"Amir Khaki ,&nbsp;Lívia Mesquita Dias Loiola ,&nbsp;Maryam Safari ,&nbsp;Christian Gerlach ,&nbsp;Charmayne Siebers ,&nbsp;Ali Gooneie ,&nbsp;Jules A.W. Harings ,&nbsp;Kim Ragaert ,&nbsp;Rudinei Fiorio","doi":"10.1016/j.polymer.2026.129623","DOIUrl":"10.1016/j.polymer.2026.129623","url":null,"abstract":"<div><div>Low environmental stress cracking resistance (ESCR) of recycled HDPE (rHDPE) is a primary barrier to increase the recycled content in rigid packaging. This study introduces a novel interphase-driven mechanism based on styrene-b-ethylene-b-ethylene/propylene-b-styrene block copolymer (SEEPS) to enhance ESCR across multiple virgin and recycled HDPE systems. Multiscale characterization techniques show that SEEPS forms an interdiffused EEP (ethylene–ethylene/propylene)/HDPE interphase in which the olefinic midblock entangles with amorphous HDPE segments, while polystyrene nanodomains act as thermoreversible physical crosslinks below the PS glass transition. This interphase suppresses chain mobility in the polymer matrix and increases resistance to tie-chain pullout and disentanglement, refining the “anchoring ties” concept into an interphase-driven mechanism. In-situ SAXS/WAXD during tensile deformation corroborates this by showing extended intermediate patterns over a wider strain window in the blend before fibrillar scattering develops. Applied to rHDPE, adding SEEPS (2.5–10.0 wt%) promoted a steady increase in ESCR by up to 130 % relative to the unmodified material. ESCR improvements scaled with the matrix tie-chain concentration estimated by using the Huang–Brown approach. The interphase-anchoring mechanism enabled by adding tailor-made block copolymers offers a promising route for enhancing the performance of recycled HDPE.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129623"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the durability and chlorine-resistance of thin-film composite polyamide membrane via redox-initiated graft polymerisation with ascorbic acid and antibacterial ZnO nanoparticles","authors":"Huong Thi Mai Lai ,&nbsp;Anh Thi Kieu Vo ,&nbsp;Vuong Duy Nguyen ,&nbsp;Son Thi Nguyen ,&nbsp;Ngoc Thi Bich Vu ,&nbsp;Thu Hong Anh Ngo","doi":"10.1016/j.polymer.2026.129658","DOIUrl":"10.1016/j.polymer.2026.129658","url":null,"abstract":"<div><div>Thin-film composite polyamide (TFC/PA) membranes are widely applied in water treatment but remain limited by fouling, biofouling, and chlorine-induced degradation. To address the above disadvantages, this work modified TFC/PA membranes via redox-initiated graft polymerisation of hydrophilic Ascorbic acid (AsA) combined with antibacterial zinc oxide nanoparticles (ZnONPs). Structural and surface characterisation using scanning electron microscopy with energy-dispersive X-ray spectrometry (SEM-EDX), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and water contact angle (WCA) measurements confirmed the successful incorporation of AsA and ZnONPs. These analyses demonstrated a significant increase in surface hydrophilicity, as evidenced by the decrease in WCA from 49.5° to 35.8° and 33.6°. Filtration experiments demonstrated that the grafted membranes maintained stable sodium chloride retention (95.5 %), exhibited a higher flux ratio, and showed a lower irreversible fouling factor than the TFC/PA membrane. Importantly, the ZnONPs/AsA-grafted membrane displayed strong antibacterial activity against both Gram-negative and Gram-positive bacteria, sustaining filtration performance even after 4 days of bacterial exposure. Thus, the antifouling and anti-biofouling properties of the grafted membrane were enhanced. Moreover, the grafted membrane maintained its separation performance after immersion in NaClO solutions up to 15,000 ppm h, indicating superior chlorine resistance compared with the TFC/PA membrane. Overall, this work introduces a novel approach using AsA and ZnONPs to enhance antifouling, anti-biofouling, and chlorine resistance, offering promising potential for TFC/PA membranes in water treatment applications.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129658"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146047946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-based thioether polyols from limonene and geraniol: Toward sustainable high-performance polyurethane thermosets","authors":"Sauravkumar Patel ,&nbsp;Chandan Bodhak ,&nbsp;Ram K. Gupta","doi":"10.1016/j.polymer.2026.129636","DOIUrl":"10.1016/j.polymer.2026.129636","url":null,"abstract":"<div><div>Polyurethanes (PUs) are ubiquitous amongst versatile polymeric materials that are usually made by the reaction of polyisocyanates with polyols, yielding materials with a wide range of mechanical, chemical, and physical properties. Nowadays, more attention is given to designing PU networks involving the emerging techniques, including structurally modified bio-based polyols, compared to the use of conventional petroleum-based resources. In this context, “thiol-ene” click reactions are one of the most effective techniques for structural modification of unsaturated bio-based resources to prepare the polyols under a sustainable approach. Herein, we have developed an efficient route for the synthesis of limonene and geraniol-based thioether polyols (LME and GME) <em>via</em> the “thiol-ene” click reaction under solvent-free conditions. Thereafter, the prepared thioether polyols were used to fabricate a series of polyurethane thermoset networks under catalyst-free condition with tunable thermal and mechanical properties involving two different diisocyanates (IPDI and CHMDI) for PU formulation. Additionally, the influence of soybean oil polyol (SBPO) on the structural rigidity of the PU networks has also been investigated. All the PU thermosets appear as transparent, rigid, or semi-rigid films and exhibit a high glass transition temperature (<em>T</em>_<em>g</em>) as well as robust mechanical properties. For instance, all the prepared PU thermosets displayed the tunable <em>T</em>_<em>g</em> values ranging from 20.5 to 75.3 °C, and the highest tensile strength of ∼36 MPa and shore D hardness of ∼85 was achieved for the GME-IPDI polyurethane thermoset. The fabricated PU materials exhibit moderate UV resistance and also no significant yellowing phenomenon was observed due to the presence of aliphatic backbone. Briefly, the present work explores the scope of terpene feedstocks for the development of sulfur-functionalized high-performance polyurethane networks with enhanced thermal stability and mechanical strength.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129636"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146047992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From microstructure to function: Cooperative deformation in high-performance shape memory fibers","authors":"Xiaoyu Guan ,&nbsp;Chunyan Lou ,&nbsp;Heng Zhang ,&nbsp;Xiaochun Zhu ,&nbsp;Guoqian Lu ,&nbsp;Xue Liang ,&nbsp;Weiyi Xie ,&nbsp;Mingjie Hu ,&nbsp;Puzhen He ,&nbsp;Zhengfeng Dong ,&nbsp;Zihan Wang ,&nbsp;Jie Diao ,&nbsp;Rui Wang","doi":"10.1016/j.polymer.2026.129663","DOIUrl":"10.1016/j.polymer.2026.129663","url":null,"abstract":"<div><div>Designing high-performance shape memory nanofibers remains challenging because most existing studies emphasize polymer chemistry while overlooking the decisive role of microstructural architecture in regulating energy storage and release. Here, we fabricate electrospun nanofibers composed of shape memory polyurethane (SMPU) and poly(vinylidene fluoride) (PVDF) with three distinct architectures: side-by-side coupled fibers, core–shell fibers, and independently electrospun mixed-fiber networks, enabling direct comparison of microstructure-dependent shape-memory behavior. Thermomechanical experiments and finite element simulations reveal that fiber-level architecture governs stiffness, shape fixity, recovery efficiency, and actuation force in a stress-dependent manner. Core–shell fibers provide strong circumferential confinement, leading to the highest modulus and recovery-induced actuation stress, whereas side-by-side fibers promote cooperative axial deformation and exhibit superior shape fixity under small programming stress. In contrast, independently mixed fibers show inferior performance due to discontinuous stress transfer. These results demonstrate that microstructural architecture, rather than polymer composition alone, defines distinct shape-memory regimes across different deformation conditions. This work establishes microstructure engineering at the single-fiber level as a clear and generalizable strategy for designing shape-memory nanofibers with predictable and tunable performance, offering important guidance for soft actuators, adaptive textiles, and multifunctional polymer systems.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129663"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146070483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manipulating the miscibility of epoxy/bismaleimide blends to enhance high-temprature strength of GFR composites","authors":"Sedigheh Irani,&nbsp;Mehrzad Mortezaei,&nbsp;S. Mahdiye Fathollahi,&nbsp;Hassan Fattahi","doi":"10.1016/j.polymer.2026.129676","DOIUrl":"10.1016/j.polymer.2026.129676","url":null,"abstract":"<div><div>Improving the interlaminar shear strength (ILSS) of epoxy composites at high temperatures was investigated by miscible and locally immiscible blending with bismaleimide resin (BMI). Normally BMI and epoxy resin are miscible and the final composite becomes very brittle due to the low toughness of the bismaleimide. So, in order to create local immiscible blend, bismaleimide was partially cured and its molecular weight was tracked using the Ubbelohde viscometry test. This pre-cured BMI, DGEBA commercial epoxy resin and 4,4-diaminodiphenylmethane were mixed thoroughly. The final composites were laid up and fabricated using glass fibers impregnated with the mixture and then analyzed using ILSS, DMTA and SEM techniques. SEM images showed a uniform morphology of the epoxy/BMI blends and the local phase separation of the epoxy/pre-cured BMI blends. The results of the ILSS test showed that the presence of 30 phr pre-cured BMI increased the interlaminar shear strength from 50 to 55 MPa. At 80 °C, the ILSS of regular epoxy decreased from 50 to 37 MPa, a 26 % decrease due to the test temperature approaching the epoxy Tg. In contrast, the ILSS of the epoxy composite containing pre-cured BMI was 45 MPa, 21 % higher than the regular epoxy composite. These results indicate that incorporating pre-cured BMI not only mitigates the loss of ILSS at elevated temperatures but also enhances thermal resistance. The transition from a fully miscible to a locally immiscible morphology in the epoxy/BMI system helps reduce the embrittlement typically associated with BMI, thereby improving the overall mechanical performance of the composite at high temperatures.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129676"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structures and dynamics of polymer nanocomposites: filler-polymer interaction and desorption-mediated agglomeration","authors":"Yadong Lu ,&nbsp;Shuo Qi ,&nbsp;Hao Zhang ,&nbsp;Yiming Wang ,&nbsp;Wei You ,&nbsp;Fenggang Bian ,&nbsp;Wei Yu","doi":"10.1016/j.polymer.2026.129627","DOIUrl":"10.1016/j.polymer.2026.129627","url":null,"abstract":"<div><div>The delicate balance between filler-filler and filler-polymer interactions primarily determines the thermodynamics governing nanofiller dispersion in polymer matrices. While it is well established that the relative strength of these interactions significantly influences dispersion quality, a critical gap remains in our understanding of how dynamic changes in these interactions affect multiscale structures and material properties. In this work, we employ polymer matrices and fillers with varying polarities to elucidate the influence of interfacial energy on filler dispersion and mechanical reinforcement. A detailed analysis of the hierarchical filler structures demonstrates that enhanced attractive filler-polymer interactions promote nanofiller dispersion. Notably, particles with lower surface hydroxyl density impose stronger topological constraints on the polymer matrix, thereby producing a greater enhancement of the rubbery modulus at the same specific area. This phenomenon can be attributed to the distinct loop conformation of adsorbed polymer chains according to the adsorption-induced entanglement mechanism. Through quantitative analysis of the failure of time-temperature superposition, we uncover temperature-dependent variations in the adsorption state, which are further corroborated by thermodynamic analysis of desorption using Fourier transform infrared spectroscopy. Our results reveal that interfacial adhesion energy and the conformational state of adsorbed chains govern the desorption process. Desorption of chains exhibiting loop conformations triggers further nanofiller agglomeration.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129627"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146014722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pressure-induced crystallization and polymorphic transitions of polybutene-1: High-pressure PVT study","authors":"F. Olla,&nbsp;F. Briatico Vangosa","doi":"10.1016/j.polymer.2026.129632","DOIUrl":"10.1016/j.polymer.2026.129632","url":null,"abstract":"<div><div>Isotactic poly(1-butene) exhibits pressure-sensitive polymorphism, yet quantitative, phase-resolved volumetric evidence across processing-relevant pressures remains limited. High-pressure PVT dilatometry was employed to monitor specific-volume changes during controlled melt crystallization and remelting between 10 and 200 MPa at a fixed cooling rate. The resulting dilatometric fingerprints enable phase attribution after crystallization under each pressure condition. At low pressures (<span><math><mo>≤</mo></math></span>60 MPa) crystallization proceeds predominantly to form II; in an intermediate window (approximately 75–100 MPa) hydrostatic pressure markedly accelerates the solid–solid II<span><math><mo>→</mo></math></span>I transformation during or shortly after crystallization, yielding form-I–dominated structures. At higher pressures (<span><math><mo>≳</mo></math></span>110 MPa) signatures of form I<span><math><msup><mrow></mrow><mrow><mo>′</mo></mrow></msup></math></span> emerge and intensify, and beyond <span><math><mo>∼</mo></math></span>175 MPa the melting response is consistent with predominantly form I<span><math><msup><mrow></mrow><mrow><mo>′</mo></mrow></msup></math></span>. Across the series, specific volume of the solid phase follows the expected order (<span><math><mrow><msub><mrow><mi>V</mi></mrow><mrow><mi>I</mi></mrow></msub><mo>≲</mo><msub><mrow><mi>V</mi></mrow><mrow><msup><mrow><mi>I</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow></msub><mo>&lt;</mo><msub><mrow><mi>V</mi></mrow><mrow><mi>II</mi></mrow></msub></mrow></math></span>), providing a consistent volumetric basis for phase assignment. Phase-resolved <span><math><mrow><mi>V</mi><mrow><mo>(</mo><mi>T</mi><mo>,</mo><mi>P</mi><mo>)</mo></mrow></mrow></math></span> maps for the melt and for forms I, II, and I<span><math><msup><mrow></mrow><mrow><mo>′</mo></mrow></msup></math></span> are assembled from these data, offering practical inputs for shrinkage prediction and process design. The findings delineate pressure protocols that suppress persistence of metastable form II and enable direct access to targeted polymorphs, mitigating delayed post-crystallization dimensional change in polybutene components.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"346 ","pages":"Article 129632"},"PeriodicalIF":4.5,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146021842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}