Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 133, Issue 17, Pages -Publisher
WILEY
DOI: 10.1002/app.43337
Keywords
differential scanning calorimetry (DSC); elastomers; properties and characterization; thermal properties; thermoplastics
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Funding
- National High Technology Research and Development Program of China [2012AA06A111]
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A thermoplastic poly(ether ester) elastomer (TPEE) is composed of polyester hard segments and polyether soft segments. Polyester and polyether segments are often homopolymer segments. This work aims at incorporating poly(butylene phthalate (PBP) as co-hard segments in the hard segments of poly(butylene terephthalate) (PBT)-b-poly(tetramethylene oxide) (PTMO) thermoplastic elastomer, and investigating structures and properties of the resulting materials, denoted as (PBT-co-PBP)-b-PTMO. (PBT-co-PBP)-b-PTMO was synthesized from dimethyl terephthalate (DMT), dimethyl phthalate (DMP), PTMO (M-n=1000 g/mol), and 1,4-butanediol (BDO). The crystallinity of (PBT-co-PBP)-b-PTMO first decreased and then increased with increasing PBP content from 5% to 10% due to a decrease in the average sequence length of the PBT hard segments. Its elongation at break was increased by 200-350%. When the mass fractions of PBT and PBP were 42% and 8%, respectively, the (PBT-co-PBP)-b-PTMO showed the best performance in terms of permanent deformation, strength, and hardness whose values were 30%, 25 MPa, and 37 D, respectively. All the synthesized copolymers had good thermal stability with a decomposition temperature of 400 degrees C or so. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43337.
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