A) A large molecule composed of repeating structural units B) A type of metal C) A small inorganic molecule D) A single atom
A) Decomposition polymerization B) Ring-opening polymerization C) Addition polymerization D) Condensation polymerization
A) The temperature at which the polymer melts B) The temperature at which the polymer transitions from a glassy to a rubbery state C) The temperature at which the polymer crystallizes D) The temperature at which the polymer decomposes
A) To enhance polymer solubility B) To increase mechanical strength and stability C) To reduce polymer chain length D) To decrease polymer density
A) Increased molecular weight decreases viscosity B) Molecular weight has no effect on viscosity C) Increased molecular weight leads to lower elasticity D) Increased molecular weight leads to higher viscosity
A) To determine polymer degradation kinetics B) To explain the thermodynamics of polymer solutions and blends C) To model polymer chain conformation D) To predict the mechanical properties of polymers
A) To inhibit polymer chain flexibility B) To promote the formation of small crystalline regions in a polymer C) To increase the glass transition temperature D) To enhance polymer solubility
A) To reduce polymer flexibility B) To decrease polymer durability C) To enhance or modify the properties of polymers D) To break down polymer chains
A) A polymer with only one repeating unit B) A polymer composed of two or more different monomers C) A single monomer molecule D) A polymer with a high degree of crystallinity
A) To increase mechanical strength and prevent slippage of polymer chains B) To decrease polymer solubility C) To induce polymer degradation D) To promote polymer crystallization
A) In the glassy state, the polymer is hard and brittle B) The glassy state does not affect polymer properties C) The glassy state is for amorphous polymers only D) The glassy state promotes polymer flexibility
A) Doi and Edwards B) Pierre-Gilles de Gennes C) Flory D) I. M. Lifshitz
A) Worm-like chain model B) Ideal chain models C) Real chain models D) Hindered rotation model
A) Rotational isomeric state model B) Freely-rotating chain C) Hindered rotation model D) Worm-like chain model
A) Positions of minima in rotational potential energy. B) A Boltzmann factor based on potential energy. C) Fixed bond angles due to chemical bonding. D) Persistence length.
A) Worm-like chain model B) Freely-jointed chain model C) Finite extensible nonlinear elastic model D) Rotational isomeric state model
A) Statistical physics B) Polymer chemistry C) Thermodynamics D) Condensed matter physics
A) Directed walk B) Brownian motion C) Self-avoiding random walk D) Simple random walk
A) Bad solvent B) None of these C) Theta solvent D) Good solvent
A) 3/5 B) 1/2 C) 1/4 D) 1/3
A) Behaves like a solid sphere B) Becomes an ideal chain C) Forms a fractal object D) Expands significantly
A) Bad solvent B) Good solvent C) Theta solvent D) None of these
A) Directed walk B) Self-avoiding random walk C) Brownian motion D) Simple random walk
A) More than 100 nm. B) Less than 10 nm. C) About 50 nm. D) Exactly 25 nm.
A) √N. B) N/b. C) bN. D) 0.
A) x_rms = b√N. B) x_rms = bN. C) x_rms = √bN. D) x_rms = N/b.
A) Uniform distribution B) Gaussian distribution C) Binomial distribution D) Exponential distribution
A) ⟨ri ⋅ rj⟩ = b²δij B) ⟨ri ⋅ rj⟩ = 3b²δij C) ⟨ri ⋅ rj⟩ = R² D) ⟨ri ⋅ rj⟩ = Nδij
A) ⟨R ⋅ R⟩ = N²b² B) ⟨R ⋅ R⟩ = Nb C) ⟨R ⋅ R⟩ = b³ D) ⟨R ⋅ R⟩ = 3Nb²
A) Ω(R) = cP(R) B) Ω(R) = R/P(R) C) Ω(R) = P(R)/c D) Ω(R) = cR
A) S(R) = Ω(R)/kB B) S(R) = kB ln(Ω(R)) C) S(R) = kBΩ(R) D) S(R) = ln(kBΩ(R))
A) ΔF = kBΔS(R) B) ΔF = -TΔS(R) C) ΔF = TΔS(R) D) ΔF = S(R)/T |