Aliphatic Polyesters of Butyne‐1,4‐Diol

Kricheldorf, Hans R.; Gao, Quinwei; Buzin, Pavel; Schwarz, Gert

doi:10.1002/macp.200700429

Cited by 10 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Samples 5 and 6 were obtained by the polycondensation of butyne‐1,4‐diol (ByD) with dicarboxylic acid dichlorides with pyridine as a catalyst 6. After precipitation and filtration, the final products were dried in vacuo at 20°C overnight.…”

Section: Methodsmentioning

confidence: 99%

“…According to the two-phase model, the hardness of a semicrystalline polymer is given by the following equation: 29 H ¼ H c a þ H a ð1 À aÞ (2) where H c and H a are the crystalline and amorphous hardnesses values, respectively, and a is the degree of crystallinity. From preceding publications, 5,6,[7][8][9] we knew that all of the samples under study present T g values well below 0 C. Because in all cases, H a % 0, eq. (2) can be written as…”

Section: Microindentation Hardnessmentioning

confidence: 99%

“…A series of aliphatic polyesters (samples 1–6) were synthesized in recent years by Kricheldorf and coworkers 4–6. The chemical formulas are given in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Kricheldorf et al5 recently published an article devoted to samples 3 and 4. However, to our knowledge, there have only been a few studies dealing with samples 519 and 621 before the study just reported by Kricheldorf et al6 In this publication,6 three methods developed for the synthesis of samples 5 and 6 with high molecular weights were presented and discussed. Method A consisted of the thermal transesterification of ByD with the dimethyl ester of a sebacic acid in bulk catalyzed by Ti(OBu) 4 .…”

Section: Introductionmentioning

confidence: 99%

“…A series of aliphatic polyesters (samples 1-6) were synthesized in recent years by Kricheldorf and coworkers. [4][5][6] The chemical formulas are given in Figure 1. As shown, samples 1 and 2 are saturated polyesters based on 1,4-butane diol.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Micromechanical behavior related to the nanostructure of biodegradable polyesters

Cagiao

Buzin

Kricheldorf

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

The microhardness of a series of biodegradable polyesters was determined. The nanostructural features of these materials were studied by wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS), and differential scanning calorimetry. Analysis of the SAXS and WAXS patterns allowed direct derivation of the degree of crystallinity and crystal thickness values, and correlations of the micromechanical properties are presented. The differences in the thermal and mechanical properties exhibited by the studied systems and the ones found in other aromatic polyesters are explained as due to the different chemical natures of the monomeric units.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Microindentation Hardnessmentioning

confidence: 99%

“…A series of aliphatic polyesters (samples 1–6) were synthesized in recent years by Kricheldorf and coworkers 4–6. The chemical formulas are given in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Micromechanical behavior related to the nanostructure of biodegradable polyesters

Cagiao

Buzin

Kricheldorf

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Early development of a biodegradable energetic elastomer

Cossu

Heuzey

Lussier

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

The expected depletion of oil resources and a greater awareness for the environmental impact of plastic products have created a strong interest toward energetic polymers that are not only biodegradable but also obtainable from renewable resources. In this work, a copoly(ester/ether) was synthesized from polyepichlorohydrin and sebacoyl chloride using pyridine as a Lewis-base catalyst. The chlorinated polymer was azidified with NaN 3 in dimethyl sulfoxide solutions. The success of the reaction was confirmed by 1 H-NMR, 13 C-NMR, and Fourier-transform infrared spectroscopy. Two types of polyurethane networks were synthesized from the nonenergetic and the energetic copolymers, adding polycaprolactone triol and using L-lysine diisocyanate as a nontoxic curing agent. The two resulting polyurethanes were soft thermoset elastomers. The polyurethanes were chemically and mechanically characterized, and their biodegradability was evaluated in compost at 55 C. The nonenergetic and the energetic polyurethanes showed a glass-transition temperature of À14 C, and À23 C, respectively. The weight loss of the polyurethanes during the composting experiments was monitored. It increased almost linearly with time for both materials. After 20 days, the nonenergetic samples lost about 50% of their mass because of the biodegradation mechanism. Instead, the energetic elastomers lost only about 25% of their initial mass after 25 days. The experimental results revealed that the azide pendant group in the soft segment (the polyether segments) is the main factor that controls the physical, mechanical, and degradation properties of these polyurethane networks.

show abstract

Syntheses of Polyesters from Succinic Anhydride and Various Diols Catalyzed by Metal Triflates

Yashiro¹,

Kricheldorf

Huijser

2009

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

Succinic anhydride (SuAh) was polymerized with various α,ω‐alkanediols from 1,3‐propanediol up to 1,10‐decanediol. Most polycondensations were conducted in bulk at temperatures of 80 °C with bismuth triflate as catalyst and number average molecular weights ($\overline M _{\rm n} {\rm s}$, uncorrected SEC data) up to 35 000 Da were obtained. Polycondensations of SuAh with 1,6‐hexanediol were also catalyzed with aluminum, tin(II), scandium, lanthanium, samarium, and hafnium triflate. Whereas, poor results were achieved with La‐triflate, aluminum and tin(II) triflate yielded $\overline M _{\rm n} {\rm s}$ comparable to those obtained with Bi‐triflate. With exception of the basic lanthanum triflate, all other catalysts generated small amounts of ether groups. The MALDI‐TOF mass spectra proved that the molecular weights depended on the conversion and on the extent of cyclization. The polycondensations of 1,4‐butanediol at temperatures up to 120 °C were affected by the formation of tetrahydrofuran, and even with an excess of the diol $\overline M _{\rm n} {\rm s}$ <10 000 Da were not obtained. Yet, BiCl3 and Bi‐triflate catalyzed polycondensations in refluxing decalin gave satisfactory results ($\overline M _{\rm n} {\rm s}$ ≈ 30 000 Da, uncorrected SEC data).

show abstract

Aliphatic Polyesters of Butyne‐1,4‐Diol

Cited by 10 publications

References 22 publications

Micromechanical behavior related to the nanostructure of biodegradable polyesters

Micromechanical behavior related to the nanostructure of biodegradable polyesters

Early development of a biodegradable energetic elastomer

Syntheses of Polyesters from Succinic Anhydride and Various Diols Catalyzed by Metal Triflates

Contact Info

Product

Resources

About