Unveiling the molecular mechanism of self-healing in a telechelic, supramolecular polymer network.

Reversible polymeric networks can show self-healing properties due to their ability to reassemble after application of stress and fracture, but typically the relation between equilibrium molecular dynamics and self-healing kinetics has been difficult to disentangle. Here we present a well-characterized, self-assembled bulk network based on supramolecular assemblies, that allows a clear distinction between chain dynamics and network relaxation. Small angle x-ray scattering and rheological measurements provide evidence for a structurally well-defined, dense network of interconnected aggregates giving mechanical strength to the material.

Self-healing polymers via supramolecular forces.

As polymers and polymeric materials are "the" smart invention and technological driving force of the 20th century, the quest for self-healing or self-repairing polymers is strong. The concept of supramolecular self-healing materials relies on the use of noncovalent, transient bonds to generate networks, which are able to heal the damaged site, putting aspects of reversibility and dynamics of a network as crucial factors for the understanding and design of such self-healing materials. This Review describes recent examples and concepts of supramolecular polymers based on hydrogen bonding, π-π interactions, ionomers, and coordinative bonds, thus convincingly discussing the advantages and versatility of these supramolecular forces for the design and realization of self-healing polymers.

The needs of carers: a comparison between eating disorders and schizophrenia.

Objective: This pilot study compares the level of distress and the need for support between carers of patients with anorexia (AN) and bulimia nervosa (BN) and carers of patients with schizophrenia.

Methods: Thirty-two carers of patients suffering from AN and BN and 30 carers of patients with schizophrenia filled out the general health questionnaire (GHQ-12) and the burden inventory (BI). In addition, they were interviewed with a semi-structured research interview, the carers' needs assessment (CNA), to assess relevant problem areas as well as the need for helpful interventions.

The needs of carers of patients with anorexia and bulimia nervosa.

Objective: This study aims to assess the degree of distress and the need for support of carers of patients with anorexia and bulimia nervosa (BN).

Methods: Thirty-two carers filled out the General Health Questionnaire (GHQ-12) and the Burden Inventory (BI). In addition, they were interviewed with a semi-structured research interview, the Carers' Needs Assessment (CNA), to assess relevant problem areas as well as the needs for helpful interventions.