Crystallization behavior of poly(trimethylene terephthalate)/mesoporous silica SBA-15 composites prepared by in situ polymerization

Yin, Li; Wu, Defeng; Yao, Zhen; Feng, Shi-Ming; Zhang, Ming; Gao, Yinghong

doi:10.1016/j.tca.2013.04.038

Cited by 11 publications

(10 citation statements)

References 64 publications

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“…On the other hand, the PTT in the master batch also plays an important role of counteracting reinforcement effect by the SBA‐15 particles because its molecular weight is far lower than the commercial PTT used as matrix in this work. As discussed in the previous work , the side reactions between SBA‐15 particles and PTT chain during in situ hybridization result in an evident molecular weight decrease of PTT. The final M n of PTT in the master batch is only about 13,000 g/mol.…”

Section: Resultsmentioning

confidence: 69%

“…The formation of physical crosslinking between polymer chain and mesoporous silica particles was also observed on the poly(trimethylene terephthalate) (PTT)/mesoporous silica (SBA‐15) composites prepared by in situ polymerization in our previous work . The results revealed that the hydroxyl group of mesoporous silica from outside to inside surface could react with the end hydroxyl group of polyester oligomers or chains during polymerization to form the grafted or crosslinked structure between silica particles and PTT chain.…”

Section: Introductionmentioning

confidence: 60%

“…An evident up‐shift of tan δ peak is seen with addition of SBA‐15, indicating that the composite samples have higher glass transition temperature ( T g ) than the pure PTT. As discussed in the previous work , the hydroxyl group on the inside pore wall or edge of SBA‐15 can react with the PTT oligomers or chain during in situ polymerization of the master batch, leading to the formation of mesoporous particles with the pores coated from outside to inside surface. In the following melt mixing process, therefore, the matrix PTT chain is readily to be diffused into the coated channels because of good affinity between them.…”

Section: Resultsmentioning

confidence: 90%

“…The as‐obtained mesoporous SBA‐15 particles present a column‐like morphology with the average diameter of about 0.8 μm and the average length of about 1.5 μm. The PTT/SBA‐15 composite system used as the master batch in this work was prepared by in situ polymerization, which was reported in the previous work .…”

Section: Methodsmentioning

confidence: 99%

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Mechanical properties and creep behavior of poly(trimethylene terephthalate)/mesoporous silica composites

Liu

Yin

et al. 2014

Polymer Composites

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The poly(trimethylene terephthalate) (PTT) containing mesoporous silica (SBA‐15) prepared by in situ polymerization were used as the master batch in this work and mixed with the commercial PTT to fabricate PTT/mesoporous silica composites. The mechanical properties and viscoelastic behaviors such as creep and creep recovery of as‐obtained composite system were then studied in detail. The results reveal an evident reinforcing effect of the mesoporous SBA‐15 particles at the lower loading levels. Compared with those of the pure PTT, the tensile strength and impact strength of the composite with 0.5 wt% SBA‐15 particles increase by about 26% and 10%, respectively. This is attributed to the physical crosslinking between SBA‐15 and PTT chain caused by the mesoporous structure of SBA‐15 particle, which is confirmed by the increased glass transition temperature of the composites relative to the pure PTT. At the higher loading levels, however, the presence of mesoporous particle reduces the overall strength of PTT because the concentration of lower molecular weight PTT in the master batch also increases with increasing loading of SBA‐15. Therefore, superfluous addition of master batch has negative contribution to the mechanical strength of PTT composites. Besides, the composite system presents the higher creep levels and the lower recovery rates than the pure PTT, indicating that the presence of mesoporous SBA‐15 particles restrains the movements of PTT chain segments during creep and creep recovery. This is further confirmed by the viscoelastic model predictions. POLYM. COMPOS., 36:1386–1393, 2015. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

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Mechanical properties and creep behavior of poly(trimethylene terephthalate)/mesoporous silica composites

Liu

Yin

et al. 2014

Polymer Composites

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“…During the past decades, PTT nanocomposites hybridized with nanoclays, carbon nanotubes, graphene nanosheets, and inorganic nanoparticles (silica or mesoporous silica nanoparticles, nano‐BaSO4) have been extensively investigated. The influence of nano‐scaled filler on the morphology, crystallization behavior, rheological properties, and mechanical properties of PTT/nano‐scaled filler nanocomposites has been well studied.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, thermal properties and crystalline morphology of poly(trimethylene terephthalate)/ZnO nanocomposites prepared by dual in situ polymerization

Yao²,

Yang

2016

Polym. Adv. Technol.

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Poly(trimethylene terephthalate)/ZnO nanocomposites were successfully prepared by dual in situ polymerization. Firstly, ZnO nanoparticles were synthesized by a simple polyol method using 1,3-propanediol (PDO) as solvent and stabilizer. Then, PTT/ZnO nanocomposites were prepared by in situ polymerization. The results of Fourier transform infrared spectra showed that PTT molecular chains were grafted to the surface of ZnO nanoparticles. The results of 1 H NMR spectra confirmed that propyl ester molecules (as reaction product) were incorporated into PTT molecular chains. It was found that the intrinsic viscosity and molecular weight of synthesized PTT decreased with the addition of ZnO nanoparticles and the incorporation of propyl ester molecules. TEM results showed that ZnO nanoparticles with particle size of 20~30 nm were well dispersed and fully distributed in the polymer matrix. Besides, the melting temperatures and crystallization temperature decreased gradually and then increased slightly with the increasing loading of ZnO nanoparticles. Because of the strong interaction between ZnO nanoparticles and PTT matrix, the thermal stability of PTT/ZnO nanocomposites was improved. Interestingly, the results of Polarized Optical Microscopy showed that banded spherulites morphology can be observed in all PTT/ZnO nanocomposite samples. However, at higher loading of ZnO nanoparticles, band spacing became larger and was finally disturbed.

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Fluorescence Photoswitching in a Series of Metal‐Organic Frameworks Loaded with Different Anthracenes

Díaz-Ramírez

Ibarra

et al. 2021

Eur J Inorg Chem

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The confinement of luminescent guest molecules in porous host materials can induce photophysical properties different from either component in isolation. In this work, we studied several host‐guest systems consisting of anthracene and its substituted analogs adsorbed in a series of metal‐organic frameworks (MOFs) and inorganic molecular sieves. Fluorescence photoswitching of the guest molecules through photoinduced dimerization is observed only in MOFs with a favorable pore volume and geometry.

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Crystallization behavior of poly(trimethylene terephthalate)/mesoporous silica SBA-15 composites prepared by in situ polymerization

Cited by 11 publications

References 64 publications

Mechanical properties and creep behavior of poly(trimethylene terephthalate)/mesoporous silica composites

Mechanical properties and creep behavior of poly(trimethylene terephthalate)/mesoporous silica composites

Synthesis, thermal properties and crystalline morphology of poly(trimethylene terephthalate)/ZnO nanocomposites prepared by dual in situ polymerization

Fluorescence Photoswitching in a Series of Metal‐Organic Frameworks Loaded with Different Anthracenes

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