Hydrolytic degradation of bio-based polyesters: Effect of pH and time
A hydrolytic degradation study of two bio-based polyesters, poly(trimethylene malonate) (PTM) and poly(trimethylene itaconate) (PTI) with bimodal molecular weight distribution, was performed in aqueous solutions adjusted to pH values from ∼5.5 to 11. Final weight loss varied from 20 to 37 wt% for PT...
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| Veröffentlicht in: | Polymer testing 2016-07, Vol.52 (C), p.192-199 |
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| creator | Rowe, Mathew D. Eyiler, Ersan Walters, Keisha B. |
| description | A hydrolytic degradation study of two bio-based polyesters, poly(trimethylene malonate) (PTM) and poly(trimethylene itaconate) (PTI) with bimodal molecular weight distribution, was performed in aqueous solutions adjusted to pH values from ∼5.5 to 11. Final weight loss varied from 20 to 37 wt% for PTM and from 7 to 21 wt% for PTI as a function of degradation time and initial solution pH. Fourier transform infrared (FTIR) spectroscopy was used to monitor ester bond concentration of these bioplastics, and the molecular weights and polydispersity index were obtained by gel-permeation chromatography (GPC). Solutions with lower initial pH values resulted in lower molecular weights for both PTM and PTI after one week of degradation. Degradation especially affected the amorphous region, leading to an increase in crystallinity of PTI samples. |
| doi_str_mv | 10.1016/j.polymertesting.2016.04.015 |
| format | Article |
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Final weight loss varied from 20 to 37 wt% for PTM and from 7 to 21 wt% for PTI as a function of degradation time and initial solution pH. Fourier transform infrared (FTIR) spectroscopy was used to monitor ester bond concentration of these bioplastics, and the molecular weights and polydispersity index were obtained by gel-permeation chromatography (GPC). Solutions with lower initial pH values resulted in lower molecular weights for both PTM and PTI after one week of degradation. 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Final weight loss varied from 20 to 37 wt% for PTM and from 7 to 21 wt% for PTI as a function of degradation time and initial solution pH. Fourier transform infrared (FTIR) spectroscopy was used to monitor ester bond concentration of these bioplastics, and the molecular weights and polydispersity index were obtained by gel-permeation chromatography (GPC). Solutions with lower initial pH values resulted in lower molecular weights for both PTM and PTI after one week of degradation. Degradation especially affected the amorphous region, leading to an increase in crystallinity of PTI samples.</description><subject>Bioplastics</subject><subject>Degradation</subject><subject>Fourier transforms</subject><subject>Hydrolytic degradation</subject><subject>Infrared spectroscopy</subject><subject>Melt polycondensation</subject><subject>Molecular weight</subject><subject>Monitors</subject><subject>Polyester</subject><subject>Polyester resins</subject><subject>Weight loss</subject><issn>0142-9418</issn><issn>1873-2348</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKv_YREPXnbN536IFymtFQpe9ByyyaSmdDdrshX6781SL948Dck88847L0J3BBcEk_JhVwx-f-wgjBBH128Lmn4LzAtMxBmakbpiOWW8PkczTDjNG07qS3QV4w5jLBI7Q8v10YQkMjqdGdgGZdTofJ95m7XO562KYLJpS9oAIT5mS2tBj1N_WGeqN9noOrhGF1btI9z81jn6WC3fF-t88_byunje5JpzPuYVEK0UtbYUmNm2rSgDI9rG0PRknClSG2Eq3HDV0tKyhunWCGKU4jxVyubo9qTr070yajeC_tS-75MlSYQoiagSdH-ChuC_Dsm37FzUsN-rHvwhSlJTIXhZ1yKhTydUBx9jACuH4DoVjpJgOUUsd_JvxHKKWGIuU8RpfHUah3Tzt4MwWYJeg3FhcmS8-5_QD62tjdU</recordid><startdate>201607</startdate><enddate>201607</enddate><creator>Rowe, Mathew D.</creator><creator>Eyiler, Ersan</creator><creator>Walters, Keisha B.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>201607</creationdate><title>Hydrolytic degradation of bio-based polyesters: Effect of pH and time</title><author>Rowe, Mathew D. ; Eyiler, Ersan ; Walters, Keisha B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c444t-7e1caa2ff6503fbb723ed5b9d203f343a18d5d7094ab26f393cbd51daa44d5123</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Bioplastics</topic><topic>Degradation</topic><topic>Fourier transforms</topic><topic>Hydrolytic degradation</topic><topic>Infrared spectroscopy</topic><topic>Melt polycondensation</topic><topic>Molecular weight</topic><topic>Monitors</topic><topic>Polyester</topic><topic>Polyester resins</topic><topic>Weight loss</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rowe, Mathew D.</creatorcontrib><creatorcontrib>Eyiler, Ersan</creatorcontrib><creatorcontrib>Walters, Keisha B.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>Polymer testing</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rowe, Mathew D.</au><au>Eyiler, Ersan</au><au>Walters, Keisha B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydrolytic degradation of bio-based polyesters: Effect of pH and time</atitle><jtitle>Polymer testing</jtitle><date>2016-07</date><risdate>2016</risdate><volume>52</volume><issue>C</issue><spage>192</spage><epage>199</epage><pages>192-199</pages><issn>0142-9418</issn><eissn>1873-2348</eissn><abstract>A hydrolytic degradation study of two bio-based polyesters, poly(trimethylene malonate) (PTM) and poly(trimethylene itaconate) (PTI) with bimodal molecular weight distribution, was performed in aqueous solutions adjusted to pH values from ∼5.5 to 11. Final weight loss varied from 20 to 37 wt% for PTM and from 7 to 21 wt% for PTI as a function of degradation time and initial solution pH. Fourier transform infrared (FTIR) spectroscopy was used to monitor ester bond concentration of these bioplastics, and the molecular weights and polydispersity index were obtained by gel-permeation chromatography (GPC). Solutions with lower initial pH values resulted in lower molecular weights for both PTM and PTI after one week of degradation. Degradation especially affected the amorphous region, leading to an increase in crystallinity of PTI samples.</abstract><cop>United Kingdom</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.polymertesting.2016.04.015</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Polymer testing, 2016-07, Vol.52 (C), p.192-199 |
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| source | Elsevier ScienceDirect Journals; EZB-FREE-00999 freely available EZB journals |
| subjects | Bioplastics Degradation Fourier transforms Hydrolytic degradation Infrared spectroscopy Melt polycondensation Molecular weight Monitors Polyester Polyester resins Weight loss |
| title | Hydrolytic degradation of bio-based polyesters: Effect of pH and time |
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