INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 7
·3410
·
IF 4.9
Xue Luo,Mengyan Li,Guliang Fu,Rentong Yu,Jianhe Liao
Natural rubber (NR) has long been plagued by inferior oil resistance and poor thermal degradation at high temperatures. Despite these limitations, NR remains the most widely used elastomer to date. Fluorine-containing compounds have demonstrated excellent oil resistance and thermal stability. However, they generally exhibit poor compatibility with non-polar polymers. After blending, macroscopic phase separation cannot be easily suppressed, leading to the deterioration of the material’s properties. In this study, fluorination modification was performed using hydroxyl-terminated polybutadiene, and the resulting fluorine-modified polybutadiene (3F-PBu-3F) was incorporated into natural rubber. Following sulfur curing, homogeneous phase morphologies were observed in all vulcanizates, which significantly differed from those of previously reported NR/polybutadiene vulcanizates. Additionally, the oil resistance and thermal stability of the NR/3F-PBu-3F vulcanizates were effectively enhanced.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2018
·
IF 4.514
Yujia Kou,Wenying Zhou,Bo Li,Lina Dong,Yu-E Duan,Qianwen Hou,Xiangrong Liu,Huiwu Cai,Qingguo Chen,Zhi-Min Dang
Epoxy (EP) modified with nonpolar rubbers have the potential to achieve a concurrent improvement in mechanical and dielectric properties , when the EP-rubber interface is properly manipulated. Here we investigate rubber toughened EP based on a non-polar hydroxyl terminated polybutadiene (HTPB), and a coupling agent, dimer fatty acid diisocyanate (DDI), in which the rubber is covalently bonded to the epoxy. The mechanical and dielectric properties can be improved with the addition of HTPB and are maximized at 15 phr of elastomer inclusion. The enhanced mechanical toughness is attributed to the extensive shear yielding induced by a large amount of uniformly dispersed rubber particles; the same morphology can also combine the good insulating properties of HTPB and dielectrically favorable interfaces. These facts along with the reduced dielectric constant and loss for the modified EP suggest that the HTPB-DDI-EP can be used as a promising insulating packaging material for microelectronic applications.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Bin Yang,Kun Wang,Xiaoming Shi,Yongxian Zhao,Junyi Chen
Tough and stretchable elastomeric resins are useful materials, particularly for coatings and additive manufacturing, which constructs 3D objects through the successive deposition of curable materials. Though elastomeric resins are valued for their flexibility and mechanical resilience, remain limited in availability. In this work, a photocurable resin capable of producing highly elastic material is designed and synthesized. The resin is derived from polybutadiene-based thermoset polyurethane, which is degraded and functionalized through olefin cross-metathesis reaction. The elastomeric resin can be efficiently cured by UV light, affording robust elastomers with an excellent elongation rate (>1300%). The study reveals that the molecular architecture of the resin plays an important role in UV curing and the resulting elastomer properties. Model studies suggest the fragment architecture within the resin prevents shrinkage during UV-curing, which is a common and undesired phenomenon for photocurable elastomers. Moreover, the elastomeric resin's physical properties are tuned by incorporating a cellulose-based reinforcing component (CA-MA) and systematically adjusting the formulation. Tensile testing indicated that the addition of CA-MA significantly enhanced the modulus and toughness (46 MJ m −3 ) of the UV cured elastomer. Finally, the resin is used as a component in SLA-based 3D printing transforming the elastomeric resin into complex 3D structures.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2021
·
IF 4.282
Yuguang Liu,Bo Tian,Xinyang Liu
Enhancement interaction between polybutadiene (PB) nanoparticle and polypropylene (PP) matrix by grafts via hydrogen bonding was verified and characterized by dynamic rheological analysis. The introduction of acrylamide (AM) facilitated PB uniform distribution in PP and strengthened interfacial interaction. The correlated structure based on H-bonding interaction leading to the viscoelastic nonlinearity, which restricted polymer relaxation and exhibited different rheological responses. The formation of correlated structure is an energetically favorable process driven by enthalpy, while the dynamics of construction is controlled by diffusion of the binding groups correspondingly, thus, the reconstruction and recoverability depend on the thermodynamic equilibrium distorted by either the shearing or the temperature. Therefore, the recovery ratio increases from 77.31%, 96.53%, to 98.87%, for the blend with identical composition, when increment of temperature from 180, 200–220 °C, is attributed to relaxation enhancement for both the decrement of local viscosity and the acceleration of diffusion.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 48
·e53224
·
IF 3.057
Lv Xiaojing,Jinwei Wang,Yong Guo
Phosphorus containing liquid epoxidate polybutadiene (P-LEPB) is synthesized and used as the additive to improve the flame retardancy and toughness of epoxy resin (EP). The structure of P-LEPB is confirmed by Fourier transform infrared (FTIR), 1 H and 13 C nuclear magnetic resonance (NMR). With the addition of P-LEPB, EP composites show earlier degradation; and P-LEPB plays flame retardancy functions as reflected by the increase of limiting oxygen index (LOI) and its promotion of carbonization as seen from the char scanning electron microscopy images after LOI tests. The addition of P-LEPB improves the water proof performance of EP composites, playing positive effect on resisting water spreading on the surface and immersing in the EP composites as supported by the water absorption rates and contact angle measurements. The elongation at break increases with addition of P-LEPB and reaches nearly three times higher than the neat epoxy at P-LEPB addition of 10%, the toughening effect of P-LEPB is attributed to the diverting function by the P-LEPB microspheres upon stress loading, which is related to the size and distribution of P-LEPB additions as seen from their cross-sectional images of the composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RUBBER CHEMISTRY AND TECHNOLOGY
·
2016
·Vol. 89
·期 4
·700-711
·
IF 0.878
Hong Kan,Ni Xufeng,Shen Zhiquan
Organic supporter poly(styrene-co-divinylbenzene) (PS-DVB) was synthesized, and gas-phase polymerization of 1,3-butadiene was performed with PS-DVB–supported Nd(vers) 3 /Al 2 Et 3 Cl 3 /Al(i-Bu) 3 catalysts. Millimeter-sized granules of high cis -1,4 content (>98%) polybutadiene with an M n of 5.3–5.5 × 10 5 were obtained. Dispersants used in gas-phase polymerization of 1,3-butadiene have a significant influence on apparent activities of catalysts and appearance of products. The morphology of polybutadiene granules was also investigated by scanning electron microscopy.
研究领域:
高分子化学
·
催化化学
✓ 已验证
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 22
·4879
·
IF 4.967
Fang Xie,Zhongxin Ping,Wanting Xu,Fenghua Zhang,Yuzhen Dong,Lianjie Li,Chengsen Zhang,Xiaobo Gong
Rubber materials are widely used in aerospace, automotive, smart devices and artificial skin. It is significant to address the aging susceptibility of conventional vulcanized rubber and to impart it rapid self-healing performance for destructive crack damage. Herein, a novel supramolecular rubber elastomer is prepared by introducing metal coordination between carboxyl-terminated polybutadiene and polystyrene-vinylpyridine copolymer. Based on the metal coordination interaction, the elastomer exhibits shape memory and self-healing properties. Moreover, a rapid closure-repair process of destructive cracks is achieved by presetting temporary shapes. This shape memory-assisted self-repair model is shown to be an effective means for rapid repair of severe cracks. An approach to enhance the mechanical and self-healing properties of elastomer was demonstrated by adding appropriate amounts of oxidized carbon nano-onions (O-CNO) into the system. The tensile strength of the elastomer with an O-CNOs content of 0.5 wt% was restored to 83 ± 10% of the original sample after being repaired at 85 °C for 6 h. This study confirms that metal coordination interaction is an effective method for designing shape memory self-healing rubber elastomer. The shape memory-assisted self-healing effect provides a reference for the rapid self-repairing of severe cracks.Keywords:self-healing;polybutadiene;metal coordination;shape memory;oxidized carbon nano-onions
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Bo Lv,Keheng Pan,Yuanyuan Zuo,Zhaoxia Liu,Junjie Tan,Hongye Yan,Yu Zhou,Hongxiang Chen,Minghua Yang
Rubber as a substrate exhibits very different surface physical and chemical characteristics from steel. It still remains challenging to achieve a complete interface stripping of steel while maintaining double-sided adhesion between rubber and steel. Hydroxyl-terminated polybutadiene (HTPB) possesses remarkable low-temperature flexibility that contributes to migration and orientation of molecular chains, and contains abundant C = C bonds that facilitate cross-linking reaction. In this work, the hydroxyethyl acrylate (HEA)-terminated waterborne polyurethane (WPUH) adhesive was prepared by introducing HTPB into polyurethane backbone. The impact of HTPB on the properties of WPUH adhesive was investigated by changing HTPB/poly(tetramethylene ether) glycol (PTMG) molar ratio. The reasons for such change were studied focusing on the structure and bonding mechanism of WPUH adhesive. When rubber and steel were bonded together by WPUH adhesive, the rubber would induce non-polar HTPB segments to approach the bonding interface while the steel would attract the polar carbamate groups to its surface. The adhesion was strengthened by the interfacial interaction once WPUH adhesive wetted two substrates. In addition, the 1,2-isomer C = C bonds of HTPB could undergo free radical polymerization with HEA to form a cross-linked network, which improved the cohesion. This study provides a feasible strategy for achieving the goal of effectively bonding rubber-to-steel without residual adhesive stripping.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Jiawei Li,Zhao Ning,Weiming Yang,Bin Yang,Yanning Zeng
Hydroxyl-terminated polybutadiene (HTPB)-based polyurethane (PU) networks play indispensable roles in a variety of applications; however, they cannot be reprocessed, resulting in environmental problems and unsustainable industrial development. In this work, recyclable HTPB-based PU vitrimer (HTPB-PUV) networks are fabricated by introduction of a cross-linker 2,2′-(1,4-phenylene)-bis[4-mercaptan-1,3,2-dioxaborolane] (BDB) with dynamic boronic ester bonds into the network. Meanwhile, the BDB can stabilize the HTPB unit in the network by elimination of double bonds. The novel HTPB-PUV networks are constructed by a thiol-ene “click” reaction and an addition reaction between HTPB and cross-linker BDB and isocyanates (HDI). The dynamic HTPB-PUV networks are characterized by dynamic mechanical analysis (DMA) and Fourier transform infrared (FTIR). The obtained dynamic HTPB-PUV networks possess superior thermostability. Moreover, due to the presence of dynamic boronic ester bonds, the HTPB-PUV network topologies can be altered, contributing to the reprocessing, self-healing, and welding abilities of the final polymer. Through a hot press, the pulverized sample can be reprocessed for several cycles, and mechanical properties of the reprocessed samples are similar to those of the pristine one, with the tensile strength being even higher. The self-healed sample exhibits almost complete recovery from scratch after the healing treatment at 130 °C for 3 h. Moreover, a welding efficiency of 120% was achieved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2017
·Vol. 9
·期 6
·200
·
IF 3.364
Chuyao Liang,Jie Li,Min Xia,Guoping Li,Yunjun Luo
Based on the Diels–Alder reaction and hydroxyl-terminated polybutadiene (HTPB) binders of solid propellants, two novel compounds—furfuryl-terminated polybutadiene (FTPB) and trifurfuryl propane (TFP)—were designed and synthesized, and their structures were characterized. A new kind of reversible Diels–Alder reaction system was formed by FTPB as main resin,N,N′-1,3-phenylenedimaleimide (PDMI) as curing agent and TFP as chain extender. The results showed that this system had good mechanical properties with a tensile strength of 1.76 MPa and a tensile strain of 284% after curing, and the repair efficiency of the crack was 88%. Therefore, it could be used as a novel binder of energetic materials such as solid propellant and PBX explosives to provide them with self-repairing characteristics and improve the reliability for application.Keywords:Diels–Alder reaction;hydroxyl-terminated polybutadiene;binder;self-repairing;solid propellant
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Li Zhao,Shulai Lu,Ming Chen,Yuchao Wang,Shicheng Zhao
Polymer agglomeration method is an efficient way to enlarge the particle size of polybutadiene latex (PBL). However, thus far, the particle size of polymer agglomerating agent and agglomerated PBL could not been accurately regulated, and there is a lack of investigation of agglomeration mechanism. Herein, an efficient way for regulating the particle size of the agglomerating agent and PBL was proposed. It was found that the particle size of agglomerating agents can be obtained in the range of 69 nm to 143 nm by adjusting the monomer content and the amount of α-methacrylic acid in the emulsion polymerization process. Then, the effects of different agglomeration parameters on the particle size of agglomerated PBL were investigated, including the amount, the α-MAA content and the particle size of agglomerating agent, agglomeration temperature and agglomeration time. The results indicated that the particle size of agglomerated PBL first increased and then decreased to a stable state with the increase of the amount of agglomerating agent. This phenomenon was quite different from the results of existing studies, which show that the particle size of agglomerated PBL gradually increases with the increase of the amount of agglomerating agent. According to the investigation of agglomeration process of PBL, the PBL agglomeration mechanism of dispersion-adsorption-coalescence-shrinkage was proposed. This study not only provides theoretical support for the PBL polymer agglomeration process, but also provides a practical way to increase acrylonitrile–butadiene–styrene (ABS) production efficiency.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2024
·Vol. 45
·期 19
·2400259
·
IF 4.2
Zhihao Niu,Yimin Wang,Xin Wang,Dexian Yin,Tao Shou,Pengfei Cao,Xiuying Zhao,Shikai Hu,Liqun Zhang
The thermodynamic incompatibility between the soft and hard segments of thermoplastic polyurethane (TPU) results in a microphase-separated behavior and excellent mechanical properties. However, the effect of the chain extender on the degree of microphase separation (DMS) and the resultant mechanical properties of TPU have not been well studied because of the complex interactions between the soft and hard segments. Herein, hydroxyl-terminated polybutadiene-based TPUs(HTPB-TPUs) without hydrogen bonding between the soft and hard segments are synthesized using hydroxyl-terminated polybutadiene, toluene diisocyanate, and four different chain extenders, and the effect of the chain extender structure on DMS is analyzed experimentally using a combination of analytical techniques. Furthermore, the solubility parameters of the soft and hard segments, glass transition temperatures, and hydrogen-bond density of the HTPB-TPUs, are computed using all-atom molecular dynamics simulations. The results clearly reveal that the chain extender significantly affects the DMS and thus the mechanical properties of HTPB-TPUs. This study paves the way for studying the relationship between the structure and properties of TPU.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）