Kuhn–Mark–Houwink–Sakurada Coefficients for Determination of Molecular Parameters of cis-Polybutadiene Rubbers by Gel Permeation Chromatography

Makhiyanov, N.; Davletbaev, R. R.

doi:10.1134/s0965545x18020098

Cited by 1 publication

(2 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For cis -1,4-PB ( M w / M n in the range of 3.0 ± 0.5 and M n about (150–200) × 10 3 g/mol) in THF at 40 °C, the Mark–Houwink parameters were found to be a PB = 0.580–0.6, average = 0.59 and K PB = 8.0–9.0 × 10 –2 mL/g, average = 8.5 × 10 –2 mL/g where the weight average molecular weight of the polymer (455,000 g/mol) is used for M PS as this is closer to the viscosity average molecular weight .…”

Section: Resultsmentioning

confidence: 99%

“…For cis-1,4-PB (M w /M n in the range of 3.0 ± 0.5 and M n about (150−200) × 10 3 g/mol) in THF at 40 °C, the Mark− Houwink parameters were found to be a PB = 0.580−0.6, average = 0.59 and K PB = 8.0−9.0 × 10 −2 mL/g, average = 8.5 × 10 −2 mL/g. 43 M PB is estimated from the PS standard-based molecular weight of the PB 44…”

Section: Analysis Of the Gel Fraction And The Swellingmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Annealing of High cis-1,4-Polybutadiene/Octadecyl Acrylate Blends as a One-Step Process for Fabricating Shape Memory Polymers

Basak

Angel

Cavicchi

2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Blending molecular crystals with a cross-linkable elastomer is an inexpensive, formulation- and processing-friendly route to develop shape memory polymers (SMPs). In this work, a shape memory material consisting of thermally cross-linked, octadecyl acrylate (ODA)-grafted polybutadiene (PB) and free octadecyl acrylate was prepared. High-temperature (175 °C) annealing of a melt-processable blend of PB and ODA results in the ene grafting of a portion of the ODA onto the PB chains producing a side-chain crystalline polymer, while simultaneous cross-linking of the PB produces a cross-linked network. At ODA loadings of 0.66 ODA molecules:PB repeat unit (80 wt % ODA), materials with high shape fixity (>99%) and recovery (>99%) were prepared. Higher shape recovery was measured compared to previously reported peroxide cross-linked PB/ODA blends. Limited blooming of the free ODA was found on stored samples and during shape memory cycling, an improvement compared to other elastomer small molecule blends. These results are discussed in terms of the synthesis, structure, and physical properties of this blend system.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Analysis Of the Gel Fraction And The Swellingmentioning

confidence: 99%