SYNTHESIS OF SHAPE MEMORY POLYURETHANE/NANOCLAY COMPOSITES: CHEMICAL STRUCTURE AND INTERACTIONS BETWEEN POLYMER AND NANOCLAY PARTICLES

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HAGHAYEGH MAHNAZ; MIR MOHAMAD SADEGHI GITY; SHAMAYELI BAHMAN

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Journal: Iranian Journal of Polymer Science and Technology Year:2012 | Volume:25 | Issue:1 (ISSUE NO. 117) Page(s): 20-30

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Title

SYNTHESIS OF SHAPE MEMORY POLYURETHANE/NANOCLAY COMPOSITES: CHEMICAL STRUCTURE AND INTERACTIONS BETWEEN POLYMER AND NANOCLAY PARTICLES

Author(s)

HAGHAYEGH MAHNAZ | MIR MOHAMAD SADEGHI GITY | SHAMAYELI BAHMAN | Issue Writer Certificate

Keywords

POLYURETHANE COMPOSITEQ2

NANOCLAYQ2

TWO-STEP IN-SITU POLYMERIZATIONQ2

SHAPE MEMORY PROPERTIESQ1

CHEMICAL STRUCTUREQ2

Abstract

Although there are many works published on shape memory polyurethanes, but no report is found on PCL-based POLYURETHANE COMPOSITE using PCL with molecular weight of 2000 g/mol and NANOCLAY particles via in-situ polymerization. In this work, we try to approach some problems concerning the CHEMICAL STRUCTURE, dispersion of nanoparticles in the matrix and interaction between nanoparticles and polymer in shape memory of PCL (Mn=2000 g/mol) -based polyurethane/nanoclay composites. While PCL (Mn=2000 g/mol) polyurethane constituted the soft segments, MDI/BD formed the hard segments. The weight ratio of soft to hard segments was found to be 65/35. Composites were synthesized in presence 1 and 3 wt% of NANOCLAY (Cloisite®30B) via in-situ polymerization by a twostep method. Effect of nano particles on their interactions with polyurethane chains, crystallinity, mechanical properties and shape memory have been investigated using FTIR, DSC, tensile test and shape memory analysis, respectively. Phase mixing and hydrogen bonding intensified with 1 wt% NANOCLAY particles, whereas 3 wt% NANOCLAY led to phase separation. XRD, MTDSC, AFM analyses showed exfoliation of samples with 1 wt% NANOCLAY in the matrix and better tensile strength in comparison with pure sample and higher shape recovery compared to all other samples. Crystallinity of soft segments resulted in higher modulus and improvement of shape memory. TGA results showed a three-step degradation mechanism for PCL, MDI and BDO-based polyurethane.

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APA: Copy

HAGHAYEGH, MAHNAZ, MIR MOHAMAD SADEGHI, GITY, & SHAMAYELI, BAHMAN. (2012). SYNTHESIS OF SHAPE MEMORY POLYURETHANE/NANOCLAY COMPOSITES: CHEMICAL STRUCTURE AND INTERACTIONS BETWEEN POLYMER AND NANOCLAY PARTICLES. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 25(1 (ISSUE NO. 117)), 20-30. SID. https://sid.ir/paper/6449/en

Vancouver: Copy

HAGHAYEGH MAHNAZ, MIR MOHAMAD SADEGHI GITY, SHAMAYELI BAHMAN. SYNTHESIS OF SHAPE MEMORY POLYURETHANE/NANOCLAY COMPOSITES: CHEMICAL STRUCTURE AND INTERACTIONS BETWEEN POLYMER AND NANOCLAY PARTICLES. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2012;25(1 (ISSUE NO. 117)):20-30. Available from: https://sid.ir/paper/6449/en

IEEE: Copy

MAHNAZ HAGHAYEGH, GITY MIR MOHAMAD SADEGHI, and BAHMAN SHAMAYELI, “SYNTHESIS OF SHAPE MEMORY POLYURETHANE/NANOCLAY COMPOSITES: CHEMICAL STRUCTURE AND INTERACTIONS BETWEEN POLYMER AND NANOCLAY PARTICLES,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 25, no. 1 (ISSUE NO. 117), pp. 20–30, 2012, [Online]. Available: https://sid.ir/paper/6449/en

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