JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 13
·
IF 1.768
Yuting Cai,Xiaoqing Wu,Qinghao Liu,Hongyan Liu
Monodisperse fluorescent poly( N -isopropyl acrylamide- co -acrylic acid) microgels doped with quantum dots (QDs) were fabricated as follows. First, cysteamine-capped cadmium telluride (CA–CdTe) QDs were introduced into the microgels at pH 7 by electrostatic interactions. Afterward, the CA–CdTe QDs were further immobilized in the microgels by the collapse of the polymer network when the pH of solution was adjusted to 4. In this system, there existed multiple interactions between the CA–CdTe QDs and the microgels, including hydrogen bonds, electrostatic interactions, and coordination bonds. The photoluminescence intensity and maximum emission wavelength of the resulting microgels could be easily adjusted by changes in the content of the CA–CdTe QDs in the hybrid microgels (HMs) and with differently sized QDs, respectively. We found that the lower the addition of CA–CdTe QDs was, the bigger the blueshift of the photoluminescence spectra of the HMs was and the weaker the photoluminescence intensity was. Finally, temperature-responsive emission of the HMs was examined. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43227.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 11
·
IF 1.768
Ye Yuan,Shaokun Song,Sufen Deng,Qin Wang,Qisong Feng,Chuanxi Xiong,Lijie Dong
Exploration of new functionalization approaches to inert rigid fiber, activation inert surface, and enhancing interface adhesion is urgently required for fiber-based multiphase materials. In this paper, we developed a simple yet efficient method towards active functionalized poly( p -phenylene terephthalamide) fiber through mussel-adhesive, self-polymerization, and successive dipping–drying procedure based on as-designed detachable equipment. In comparison with current acid etching and high energy radiation methods, the active functional strategy achieves scatheless functional modification to inert rigid fiber. Attribute to π–π conjugation effect, the new active nanolayers integrate rigid fiber and polymer matrix into homogeneous-like structure. Consequently, the functionalized fiber-based composites exhibit great mechanical property and desirable field-responsive ability. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43018.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 6
·
IF 1.768
Huilin Li,Chunhui Shen,Shanshan Yin,Wei Li
Polysiloxane phosphonic acid doped polybenzimidazole (PBI) high-temperature membranes were fabricated in this study. Polysiloxane phosphonic acid instead of phosphoric acid was used as a proton conductor to prevent acid from leaking. The membrane samples with different amounts of PBI were prepared and characterized with respect to the structure, thermal properties, oxidative stability, proton conductivity, and mechanical properties. The Fourier transform infrared results show that hydrogen bonds formed between PBI and polysiloxane phosphonic acid. Thermal analysis confirmed that the temperature at which membrane experienced 10% weight loss was above 230°C. None of the membrane samples broke into pieces after Fenton reagent testing. The proton conductivity of the membrane samples with 5% PBI was up to 0.034 S/cm at 140°C under nominally anhydrous conditions. The tensile strength of the membrane samples with 10% PBI was 18.3 MPa. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42956.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 6
·
IF 1.768
KaiTao Zhang,Shibin Shang,PeiPei Sun,MingGui Shen,Dan Wang
Diethylene glycol ester of hydrogenated rosin (DGE-HR) emulsion was prepared via phase inversion method and then blended with waterborne (wb) polyacrylate for pressure-sensitive adhesives (PSAs). The preparation conditions of DGE-HR emulsion were studied. DGE-HR emulsion with an average particle size of about 220 nm was obtained. Furthermore, the thermal, adhesive, and viscoelastic properties and the morphology of DGE-HR/polyacrylate composite were investigated. Thermal analysis indicated that glass transition temperatures (T g ) of the DGE-HR/polyacrylate blends became higher as the DGE-HR content increased and DGE-HR did not have a significant influence on thermal stability of the blend films. Atomic Force Microscopy (AFM) observation revealed that the DGE-HR particles added had a good miscibility with acrylic particles. Additionally, for these tackified acrylic PSAs, positive correlations between mechanical performance and viscoelastic response at bonding and debonding frequencies were also found. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42965.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 5
·
IF 1.768
Guangfa Zhang,Qinghua Zhang,Qiongyan Wang,Xiaoli Zhan,Fengqiu Chen
A series of gradient fluorinated copolymers with a broad variation of the monomer units in the polymer chain were synthesized via semibatch CPDB-mediated RAFT miniemulsion polymerization technique. In the presence of RAFT agent 2-cyanoprop-2-yl dithiobenzoate (CPDB), the copolymerization of BMA and FMA in miniemulsion exhibited typical features of a controlled molecular weights and narrow polydispersities. The macromolecular structure and thermal behavior of the synthesized fluorinated copolymers were investigated in detail. The DSC analyses show that the gradient copolymers showed a unique thermal behavior with broad range of transition temperature. It was also confirmed that the fluorinated gradient copolymer exhibited obvious surface segregation structure and ultra-low surface energy between 16.8 and 20.3 mN/m. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42936.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 3
·
IF 1.768
Qianqian Zheng,Xiaoyan Zhou,Hui Li,Dong Ma,Wei Xue
An amphiphilic hyperbranched polyglycerol derivative (HPG-C18) was synthesized by the anionic ring-opening copolymerization with glycidol and 1,2-epoxyloctadecane as the monomers. This hyperbranched polymer formed large complex aggregates as confirmed by dynamic light scattering and transmission electron microscopy tests. Because of its amphiphilic properties, HPG-C18 was explored to load hydrophobic docetaxel, a clinical antitumor drug, and deliver it into breast cancer cell line (MCF-7) cells. To investigate the application of the aggregates in drug delivery, blood compatibility was studied by hemolysis analysis, red blood cell observation, and thromboelastography assay. These results indicate that HPG-C18 inhibited MCF-7 proliferation effectively with good blood compatibility, and this suggested a potential application in tumor therapy. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42895.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 13
·
IF 1.768
Xiaoqing Dong,Weizhen Shen,Peng Hu,Zhiquan Li,Ren Liu,Xiaoya Liu
The narrow emission spectra of light emitting diodides (LED) as irradiation source has brought great challenge for the development of efficient photoinitiators sensitive to LED light. This paper described a series of novel unimolecular type II photoinitiators, containing thioxanthones as chromophores and benzodioxoles as coinitiators. The structures of the photoinitiators were characterized by 1 H NMR, 13 C NMR and high-resolution mass spectrometer. Study on the photophysical properties of the photoinitiators indicated that electron donors/acceptors as spacers between thioxanthone and benzodioxole affected both the UV–Vis absorption and the fluorescence emission. The long wavelength absorptions from 385 nm to 402 nm as well as low fluorescence quantum yields make the investigated benzodioxole derivatives quite attractive as efficient photoinitiators under UV-A and visible LED light irradiation. With a proper molecular design, the unimolecular photoinitiator exhibited higher initiation efficiency than the thioxanthone derivatives from the literature. Possible initiation mechanism was also proposed based on the photolysis study. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43239.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 11
·
IF 1.768
Lian Tang,Yi Zheng,Shiyan Chen,Lei Wang,Huaping Wang
Flexible and nonpoisonous X-ray-shielding membranes supported by bacterial cellulose (BC) were prepared, in which X-ray-shielding materials were of microcapsule structure by using polyvinyl alcohol as shell and lead salt as core. The effect of the wall/core interaction and the amount of cross-linking agent were taken into consideration to find the optimal reaction conditions. The morphology, microcapsule size, and lead salt release properties were investigated. After supported by BC, the flexible and potable membranes for X-ray radiation protection were prepared and the shielding properties were evaluated, which indicated a good X-ray-shielding material. We set up a new method to prepare flexible and portable X-ray radiation protection membranes. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43120.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 36
·
IF 1.768
He Xiao,Beihai He,Junrong Li
Polystyrene (PS) spheres with cationic polyelectrolyte brushes were prepared by reversible addition-fragmentation chain transfer polymerization (RAFT) from cross-linked PS spheres. These PS spheres were subsequently modified by reaction with chloroacetyl chloride and S,S-Bis(α,α’-dimethyl-α”-acetic acid) trithiocarbonate to serve as macro chain transfer agents (macro-CTAs). Methacryloxyethyltrimethyl ammonium chloride (MAC) was then grafted from these macro-CTAs of PS spheres to obtain cationic PS spheres. FT-IR, 13 C-NMR, SEM, element analysis, and TGA techniques were applied to investigate and optimize the structure of PS spheres. The cationic PS spheres loading 1.35 mmol/g poly-MAC were used as absorbents for removal of polygalacturonic acid (PGA) and sodium ligninsulfonate (lignin-Na). Adsorption capacity of cationic PS spheres could reach 3 mg PGA/g and 24 mg lignin-Na/g, respectively. Moreover, adsorption isotherm data of PGA were described by Langmuir-Freundlich model, whereas lignin-Na conformed to Langmuir model. Kinetic studies suggested that dissolved substances (PGA and lignin-Na) could diffuse into the pores of cationic PS spheres. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42509.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 36
·
IF 1.768
Jinku Xu,Weiyue Zhu,Leilei Zhang,Yongchun Zhang
In this article, carbazole-grafted methacrylic polysiloxane (MA-CZ-PDMS) macromonomer was synthesized and its structure was confirmed by proton nuclear magnetic resonance ( 1 H NMR). The polysiloxane macromonomer can homogeneously copolymerize with methyl methacrylate (MMA) to prepare transparent and foldable carbazole-grafted polysiloxane-poly(methyl methacrylate) (PDMS-PMMA) membranes with a high refractive index (RI). The membranes were characterized by light transmittance, RI value, and dynamic mechanical thermal analysis (DMTA). The results indicated that the carbazole-grafted PDMS-PMMA membranes had excellent light transmittance that decreased slightly with increasing carbazole-grafted polysiloxane content. Incorporation of carbazole-grafted polysiloxane in the materials improved its RI value; however decreased the glass transmission temperature ( T g ) that can be adjusted to less than 30°C, enable the membrane foldable at room temperature. The data demonstrate that the carbazole-grafted PDMS-PMMA membranes have a potential application as high RI intraocular lens (IOL) suitable for implantation by minimally invasive surgery. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42491.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 36
·
IF 1.768
Hengnong Li,Chongbo Liu,Bing Dai,Xinghua Tang,Z. John Zhang,Zhiqiang Xiong,Xiaoming Liu
Four chiral poly Schiff bases were synthesized via polycondensation between l- lysine and p-benzoquinone, 1,4-naphthoquinone, dibenzoyl, and 2,3-butanedione, respectively. Subsequently, the silver coordination polymers of the chiral poly Schiff base were prepared upon silver ions coordinating with the chiral poly Schiff bases. The structures of the polymers were characterized with IR, UV-vis, GPC, elemental analysis, and optical activity analysis. The properties of polymers were studied through conductivity testing and electromagnetic parameter testing. The results show that they own good electrical conductvities, and the electrical conductivity of chiral poly-( l- lysine(2,3-butanedione)) Schiff base silver complex can reach 3.7 × 10 2 S/cm. The electromagnetic wave absorption properties of four silver complexes were calculated using transmission line theory, the maximum reflection loss of chiral poly-( l- lysine(p-benzoquinone)) Schiff base silver complex can reach −45.9 dB at a thickness of 5 mm, while that of achiral poly-( dl -lysine(p-benzoquinone)) Schiff base silver complex is −20.1 dB at a thickness of 5 mm. The enhanced microwave absorbing properties were attributed to the chiral feature. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42498.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 36
·
IF 1.768
Ming He,Jianjun Zhou,Huan Zhang,Zhenyang Luo,Jianfeng Yao
Microcrystalline cellulose (MCC) and its oxidized product dialdehyde cellulose (DAC) were introduced as the reinforcing filler in epoxidized soybean oil (ESO) thermosetting polymer. The composites comprising up to 25 wt % cellulose fillers were obtained via a solution casting. The reinforcing effects of the cellulose were evaluated by microstructure analysis, dynamic mechanical analysis, and tensile and thermal stability tests. The results showed that at the same filler concentration, DAC led to higher stretching strength, modulus, and break elongation than MCC. The 5 wt % DAC loading in ESO polymer exhibits the highest toughness and thermal stability due to the good dispersion and interfacial interaction between DAC and ESO polymer matrix. The increased storage modulus and glass transition temperature also indicate the cellulose fillers impart stiffness to the composites. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42488.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）