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The purpose of this paper is to investigate the effect of different heating approaches during thermal rounding of polymer powders on powder bulk properties such as particle size, shape and flowability, as well as on the yield of process.

This study focuses on the rounding of commercial high-density polyethylene polymer particles in two different downer reactor designs using heated walls (indirect heating) and preheated carrier gas (direct heating). Powder bulk properties of the product obtained from both designs are characterized and compared.

Particle rounding with direct heating leads to a considerable increase in process yield and a reduction in powder agglomeration compared to the design with indirect heating. This subsequently leads to higher powder flowability. In terms of shape, indirect heating yields not only particles with higher sphericity but also entails substantial agglomeration of the rounded particles.

Shape modification via thermal rounding is the decisive step for the success of a top-down process chain for selective laser sintering powders with excellent flowability, starting with polymer particles from comminution. This report provides new information on the influence of the heating mode (direct/indirect) on the performance of the rounding process and particle properties.

This paper explores the relationship between married women's intrahousehold decision-making participation and marital gender roles, next to factors suggested in the household bargaining literature. Additionally, the authors investigate whether women's employment carries the same importance for decision-making participation as contributions to household incomes.

Using 2011/2012 Nicaraguan Demographic and Health Survey (DHS), the authors estimate multinomial logistic regressions for eight decision-making domains, analyzing three levels of decision-making: wife-dominant or sole decisions, joint decision-making (with the partner) and decision-making by someone else. The authors create an additive index for measuring internalized marital gender roles.

Women's intrahousehold decision-making participation is explained differently depending on the decision-making area and level of participation. Women with a better relative position vis-à-vis partners and not following patriarchal gender roles are more likely to make decisions jointly with their partners, but not alone. Women's age and educational level are the strongest predictors in the analysis. Women's employment reduces their decision-making participation in children's disciplining and daily cooking-related decisions.

It focuses on married women only, while marital status might be a determinant of decision-making itself and left out the contribution of unearned incomes.

Interventions aimed at increasing women's intrahousehold decision-making participation should not only focus on economic endowments but also comprehend the gendered dynamics governing intrahousehold allocation.

The study incorporates quantitative measures of marital gender roles in the study of intrahousehold decision-making. It also contributes to the literature with insights from contexts where women's involvement in employment increased against a background of patriarchal gender roles.