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A Sulfur Copolymers (SDIB)/Polybenzoxazines (PBz) Polymer Blend for Electrospinning of Nanofibers

Department of Chemical Engineering, De La Salle University, 2401 Taft Avenue, Manila 1004, Philippines
Chemicals and Energy Division, Industrial Technology Development Institute (ITDI), Department of Science and Technology (DOST), Taguig 1631, Philippines
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
Center for Engineering and Sustainable Development Research, De La Salle University, 2401 Taft Ave, Manila 1004, Philippines
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1526;
Received: 28 September 2019 / Revised: 21 October 2019 / Accepted: 23 October 2019 / Published: 26 October 2019
This study demonstrated the processability of sulfur copolymers (SDIB) into polymer blend with polybenzoxazines (PBz) and their compatibility with the electrospinning process. Synthesis of SDIB was conducted via inverse vulcanization using elemental sulfur (S8). Polymer blends produced by simply mixing with varying concentration of SDIB (5 and 10 wt%) and fixed concentration of PBz (10 wt%) exhibited homogeneity and a single-phase structure capable of forming nanofibers. Nanofiber mats were characterized to determine the blending effect on the microstructure and final properties. Fiber diameter increased and exhibited non-uniform, broader fiber diameter distribution with increased SDIB. Microstructures of mats based on SEM images showed the occurrence of partial aggregation and conglutination with each fiber. Incorporation of SDIB were confirmed from EDX which was in agreement with the amount of SDIB relative to the sulfur peak in the spectra. Spectroscopy further confirmed that SDIB did not affect the chemistry of PBz but the presence of special interaction benefited miscibility. Two distinct glass transition temperatures of 97 °C and 280 °C indicated that new material was produced from the blend while the water contact angle of the fibers was reduced from 130° to 82° which became quite hydrophilic. Blending of SDIB with component polymer proved that its processability can be further explored for optimal spinnability of nanofibers for desired applications. View Full-Text
Keywords: sulfur copolymers; polybenzoxazines; electrospinning; polymer blend; nanofibers; inverse vulcanization sulfur copolymers; polybenzoxazines; electrospinning; polymer blend; nanofibers; inverse vulcanization
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Parreño, R.P., Jr.; Liu, Y.-L.; Beltran, A.B. A Sulfur Copolymers (SDIB)/Polybenzoxazines (PBz) Polymer Blend for Electrospinning of Nanofibers. Nanomaterials 2019, 9, 1526.

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