Crystallization in stretched and unstretched rubber-thermodynamics and kinetics

Conradt, Reinhard; Heise, B.; Kilian, H. G.

doi:10.1007/bfb0115582

Cited by 2 publications

(2 citation statements)

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“…SIC results in an increased elastic modulus during a high extension. Lamellar crystal structures are developed in natural rubber perpendicular to the direction of strain, leading to the formation of a “shish-kebab” structure . Poly(chloroprene) likewise undergoes SIC, but there are only a few reports in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…Lamellar crystal structures are developed in natural rubber perpendicular to the direction of strain, leading to the formation of a "shish-kebab" structure. 16 Poly(chloroprene) likewise undergoes SIC, but there are only a few reports in the literature. The published research on SIC in poly(chloroprene) has focused on bulk vulcanized (i.e., cross-linked) samples.…”

Section: ■ Introductionmentioning

confidence: 99%

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Competition between Crystallization and Coalescence during the Film Formation of Poly(Chloroprene) Latex and Effects on Mechanical Properties

Richardson

Martín-Fabiani

Shaw

et al. 2019

Ind. Eng. Chem. Res.

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Poly(chloroprene) is a synthetic crystallizable polymer used in several applications, including rubber gloves. The film formation of poly(chloroprene) latex offers opportunities to define structures at length scales between the molecular and macroscopic, thereby adjusting the elastomer's mechanical properties. However, the connections between processing and the resultant film properties are not fully understood. Here, we investigate the competition between the coalescence of latex particles to build cohesive strength and their crystallization to raise the elastic modulus. We demonstrate that when coalescence precedes crystallization, the elastomer has greater extensibility and a higher tensile strength compared to when crystallization occurs during coalescence. The mechanical properties of poly(chloroprene) were tuned by blending two colloids with differing gel contents and crystallizabilities. Heating above poly(chloroprene)'s melting temperature allows increased particle interdiffusion and builds cohesion, prior to recrystallization. We provide evidence from in situ wide-angle X-ray scattering for the strain-induced crystallization of as-cast films from particle blends.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%