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